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Finding the Fourth Proportional to 86,117.94, 129,229.97 and 54,484.43

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Solution

The fourth proportional to 86,117.94, 129,229.97 and 54,484.43 is: 81,760.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,117.94 : 129,229.97 = 54,484.43 : x
  2. Step 2: Convert to fraction form
    86,117.94/129,229.97 = 54,484.43/x
  3. Step 3: Cross multiply
    86,117.94x = 129,229.97 × 54,484.43
  4. Step 4: Simplify right side
    86,117.94x = 7,041,020,335.80
  5. Step 5: Solve for x
    x = 7,041,020,335.80/86,117.94
  6. Step 6: Final answer
    x = 81,760.20

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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.