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Finding the Fourth Proportional to 78,363.87, 117,565.70 and 36,274.31

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Solution

The fourth proportional to 78,363.87, 117,565.70 and 36,274.31 is: 54,420.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,363.87 : 117,565.70 = 36,274.31 : x
  2. Step 2: Convert to fraction form
    78,363.87/117,565.70 = 36,274.31/x
  3. Step 3: Cross multiply
    78,363.87x = 117,565.70 × 36,274.31
  4. Step 4: Simplify right side
    78,363.87x = 4,264,614,759.71
  5. Step 5: Solve for x
    x = 4,264,614,759.71/78,363.87
  6. Step 6: Final answer
    x = 54,420.68

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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.