Home / 85,202,816.20-127,888,205.10-42,120,665.80

Finding the Fourth Proportional to 85,202,816.20, 127,888,205.10 and 42,120,665.80

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Solution

The fourth proportional to 85,202,816.20, 127,888,205.10 and 42,120,665.80 is: 63,222,515.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,202,816.20 : 127,888,205.10 = 42,120,665.80 : x
  2. Step 2: Convert to fraction form
    85,202,816.20/127,888,205.10 = 42,120,665.80/x
  3. Step 3: Cross multiply
    85,202,816.20x = 127,888,205.10 × 42,120,665.80
  4. Step 4: Simplify right side
    85,202,816.20x = 5,386,736,346,778,955
  5. Step 5: Solve for x
    x = 5,386,736,346,778,955/85,202,816.20
  6. Step 6: Final answer
    x = 63,222,515.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.