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Finding the Fourth Proportional to 138,572.92, 191,282.62 and 90,829.34

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Solution

The fourth proportional to 138,572.92, 191,282.62 and 90,829.34 is: 125,378.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,572.92 : 191,282.62 = 90,829.34 : x
  2. Step 2: Convert to fraction form
    138,572.92/191,282.62 = 90,829.34/x
  3. Step 3: Cross multiply
    138,572.92x = 191,282.62 × 90,829.34
  4. Step 4: Simplify right side
    138,572.92x = 17,374,073,171.66
  5. Step 5: Solve for x
    x = 17,374,073,171.66/138,572.92
  6. Step 6: Final answer
    x = 125,378.56

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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.