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Finding the Fourth Proportional to 138,591.39, 191,256.20 and 74,929.65

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Solution

The fourth proportional to 138,591.39, 191,256.20 and 74,929.65 is: 103,402.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,591.39 : 191,256.20 = 74,929.65 : x
  2. Step 2: Convert to fraction form
    138,591.39/191,256.20 = 74,929.65/x
  3. Step 3: Cross multiply
    138,591.39x = 191,256.20 × 74,929.65
  4. Step 4: Simplify right side
    138,591.39x = 14,330,759,751.68
  5. Step 5: Solve for x
    x = 14,330,759,751.68/138,591.39
  6. Step 6: Final answer
    x = 103,402.96

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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.