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Finding the Fourth Proportional to 126,657.60, 189,869.76 and 60,129.06

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Solution

The fourth proportional to 126,657.60, 189,869.76 and 60,129.06 is: 90,138.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,657.60 : 189,869.76 = 60,129.06 : x
  2. Step 2: Convert to fraction form
    126,657.60/189,869.76 = 60,129.06/x
  3. Step 3: Cross multiply
    126,657.60x = 189,869.76 × 60,129.06
  4. Step 4: Simplify right side
    126,657.60x = 11,416,690,191.23
  5. Step 5: Solve for x
    x = 11,416,690,191.23/126,657.60
  6. Step 6: Final answer
    x = 90,138.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.