Home / 100,458.28-138,630.96-57,437.32

Finding the Fourth Proportional to 100,458.28, 138,630.96 and 57,437.32

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Solution

The fourth proportional to 100,458.28, 138,630.96 and 57,437.32 is: 79,262.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,458.28 : 138,630.96 = 57,437.32 : x
  2. Step 2: Convert to fraction form
    100,458.28/138,630.96 = 57,437.32/x
  3. Step 3: Cross multiply
    100,458.28x = 138,630.96 × 57,437.32
  4. Step 4: Simplify right side
    100,458.28x = 7,962,590,811.43
  5. Step 5: Solve for x
    x = 7,962,590,811.43/100,458.28
  6. Step 6: Final answer
    x = 79,262.66

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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.