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Finding the Fourth Proportional to 139,591.52, 192,634.32 and 75,929.76

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Solution

The fourth proportional to 139,591.52, 192,634.32 and 75,929.76 is: 104,781.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,591.52 : 192,634.32 = 75,929.76 : x
  2. Step 2: Convert to fraction form
    139,591.52/192,634.32 = 75,929.76/x
  3. Step 3: Cross multiply
    139,591.52x = 192,634.32 × 75,929.76
  4. Step 4: Simplify right side
    139,591.52x = 14,626,677,685.36
  5. Step 5: Solve for x
    x = 14,626,677,685.36/139,591.52
  6. Step 6: Final answer
    x = 104,781.99

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1.5x scale

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.