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Finding the Fourth Proportional to 78,491.28, 117,737.04 and 36,348.40

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Solution

The fourth proportional to 78,491.28, 117,737.04 and 36,348.40 is: 54,522.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,491.28 : 117,737.04 = 36,348.40 : x
  2. Step 2: Convert to fraction form
    78,491.28/117,737.04 = 36,348.40/x
  3. Step 3: Cross multiply
    78,491.28x = 117,737.04 × 36,348.40
  4. Step 4: Simplify right side
    78,491.28x = 4,279,553,024.74
  5. Step 5: Solve for x
    x = 4,279,553,024.74/78,491.28
  6. Step 6: Final answer
    x = 54,522.66

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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.