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Finding the Fourth Proportional to 138,645.33, 191,330.68 and 74,983.13

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Solution

The fourth proportional to 138,645.33, 191,330.68 and 74,983.13 is: 103,476.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,645.33 : 191,330.68 = 74,983.13 : x
  2. Step 2: Convert to fraction form
    138,645.33/191,330.68 = 74,983.13/x
  3. Step 3: Cross multiply
    138,645.33x = 191,330.68 × 74,983.13
  4. Step 4: Simplify right side
    138,645.33x = 14,346,573,251.43
  5. Step 5: Solve for x
    x = 14,346,573,251.43/138,645.33
  6. Step 6: Final answer
    x = 103,476.79

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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.