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Finding the Fourth Proportional to 138,793.70, 208,190.55 and 79,502.92

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Solution

The fourth proportional to 138,793.70, 208,190.55 and 79,502.92 is: 119,254.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,793.70 : 208,190.55 = 79,502.92 : x
  2. Step 2: Convert to fraction form
    138,793.70/208,190.55 = 79,502.92/x
  3. Step 3: Cross multiply
    138,793.70x = 208,190.55 × 79,502.92
  4. Step 4: Simplify right side
    138,793.70x = 16,551,756,419.07
  5. Step 5: Solve for x
    x = 16,551,756,419.07/138,793.70
  6. Step 6: Final answer
    x = 119,254.38

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1.5x scale

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.