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Finding the Fourth Proportional to 74,702.79, 103,086.17 and 40,711.17

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Solution

The fourth proportional to 74,702.79, 103,086.17 and 40,711.17 is: 56,179.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,702.79 : 103,086.17 = 40,711.17 : x
  2. Step 2: Convert to fraction form
    74,702.79/103,086.17 = 40,711.17/x
  3. Step 3: Cross multiply
    74,702.79x = 103,086.17 × 40,711.17
  4. Step 4: Simplify right side
    74,702.79x = 4,196,758,387.96
  5. Step 5: Solve for x
    x = 4,196,758,387.96/74,702.79
  6. Step 6: Final answer
    x = 56,179.41

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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.