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Finding the Fourth Proportional to 80,792.70, 121,208.28 and 40,713.20

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Solution

The fourth proportional to 80,792.70, 121,208.28 and 40,713.20 is: 61,079.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,792.70 : 121,208.28 = 40,713.20 : x
  2. Step 2: Convert to fraction form
    80,792.70/121,208.28 = 40,713.20/x
  3. Step 3: Cross multiply
    80,792.70x = 121,208.28 × 40,713.20
  4. Step 4: Simplify right side
    80,792.70x = 4,934,776,945.30
  5. Step 5: Solve for x
    x = 4,934,776,945.30/80,792.70
  6. Step 6: Final answer
    x = 61,079.49

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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.