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Finding the Fourth Proportional to 139,385.58, 192,336.66 and 77,294.52

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Solution

The fourth proportional to 139,385.58, 192,336.66 and 77,294.52 is: 106,657.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,385.58 : 192,336.66 = 77,294.52 : x
  2. Step 2: Convert to fraction form
    139,385.58/192,336.66 = 77,294.52/x
  3. Step 3: Cross multiply
    139,385.58x = 192,336.66 × 77,294.52
  4. Step 4: Simplify right side
    139,385.58x = 14,866,569,813.10
  5. Step 5: Solve for x
    x = 14,866,569,813.10/139,385.58
  6. Step 6: Final answer
    x = 106,657.88

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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.