Home / 78,678,356,392.67-108,576,458,949.35-42,549,388,816.32

Finding the Fourth Proportional to 78,678,356,392.67, 108,576,458,949.35 and 42,549,388,816.32

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Solution

The fourth proportional to 78,678,356,392.67, 108,576,458,949.35 and 42,549,388,816.32 is: 58,718,333,477.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,678,356,392.67 : 108,576,458,949.35 = 42,549,388,816.32 : x
  2. Step 2: Convert to fraction form
    78,678,356,392.67/108,576,458,949.35 = 42,549,388,816.32/x
  3. Step 3: Cross multiply
    78,678,356,392.67x = 108,576,458,949.35 × 42,549,388,816.32
  4. Step 4: Simplify right side
    78,678,356,392.67x = 4,619,861,968,135,100,825,600
  5. Step 5: Solve for x
    x = 4,619,861,968,135,100,825,600/78,678,356,392.67
  6. Step 6: Final answer
    x = 58,718,333,477.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.