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Finding the Fourth Proportional to 138,551.92, 191,202.52 and 74,889.56

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Solution

The fourth proportional to 138,551.92, 191,202.52 and 74,889.56 is: 103,348.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,551.92 : 191,202.52 = 74,889.56 : x
  2. Step 2: Convert to fraction form
    138,551.92/191,202.52 = 74,889.56/x
  3. Step 3: Cross multiply
    138,551.92x = 191,202.52 × 74,889.56
  4. Step 4: Simplify right side
    138,551.92x = 14,319,072,593.69
  5. Step 5: Solve for x
    x = 14,319,072,593.69/138,551.92
  6. Step 6: Final answer
    x = 103,348.06

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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.