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Finding the Fourth Proportional to 138,793.67, 191,521.07 and 80,641.34

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Solution

The fourth proportional to 138,793.67, 191,521.07 and 80,641.34 is: 111,276.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,793.67 : 191,521.07 = 80,641.34 : x
  2. Step 2: Convert to fraction form
    138,793.67/191,521.07 = 80,641.34/x
  3. Step 3: Cross multiply
    138,793.67x = 191,521.07 × 80,641.34
  4. Step 4: Simplify right side
    138,793.67x = 15,444,515,319.83
  5. Step 5: Solve for x
    x = 15,444,515,319.83/138,793.67
  6. Step 6: Final answer
    x = 111,276.80

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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.