Home / 83,311.16-124,966.60-20,981.66

Finding the Fourth Proportional to 83,311.16, 124,966.60 and 20,981.66

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Solution

The fourth proportional to 83,311.16, 124,966.60 and 20,981.66 is: 31,472.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,311.16 : 124,966.60 = 20,981.66 : x
  2. Step 2: Convert to fraction form
    83,311.16/124,966.60 = 20,981.66/x
  3. Step 3: Cross multiply
    83,311.16x = 124,966.60 × 20,981.66
  4. Step 4: Simplify right side
    83,311.16x = 2,622,006,035.27
  5. Step 5: Solve for x
    x = 2,622,006,035.27/83,311.16
  6. Step 6: Final answer
    x = 31,472.45

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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.