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Finding the Fourth Proportional to 100,801.28, 139,105.92 and 56,088.32

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Solution

The fourth proportional to 100,801.28, 139,105.92 and 56,088.32 is: 77,401.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,801.28 : 139,105.92 = 56,088.32 : x
  2. Step 2: Convert to fraction form
    100,801.28/139,105.92 = 56,088.32/x
  3. Step 3: Cross multiply
    100,801.28x = 139,105.92 × 56,088.32
  4. Step 4: Simplify right side
    100,801.28x = 7,802,217,354.85
  5. Step 5: Solve for x
    x = 7,802,217,354.85/100,801.28
  6. Step 6: Final answer
    x = 77,401.97

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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.