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Finding the Fourth Proportional to 138,913.48, 191,700.42 and 75,251.56

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Solution

The fourth proportional to 138,913.48, 191,700.42 and 75,251.56 is: 103,847.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,913.48 : 191,700.42 = 75,251.56 : x
  2. Step 2: Convert to fraction form
    138,913.48/191,700.42 = 75,251.56/x
  3. Step 3: Cross multiply
    138,913.48x = 191,700.42 × 75,251.56
  4. Step 4: Simplify right side
    138,913.48x = 14,425,755,657.66
  5. Step 5: Solve for x
    x = 14,425,755,657.66/138,913.48
  6. Step 6: Final answer
    x = 103,847.05

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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.