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Finding the Fourth Proportional to 100,007.28, 138,024.54 and 57,565.44

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Solution

The fourth proportional to 100,007.28, 138,024.54 and 57,565.44 is: 79,448.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,007.28 : 138,024.54 = 57,565.44 : x
  2. Step 2: Convert to fraction form
    100,007.28/138,024.54 = 57,565.44/x
  3. Step 3: Cross multiply
    100,007.28x = 138,024.54 × 57,565.44
  4. Step 4: Simplify right side
    100,007.28x = 7,945,443,375.90
  5. Step 5: Solve for x
    x = 7,945,443,375.90/100,007.28
  6. Step 6: Final answer
    x = 79,448.65

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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.