Home / 83,141.20-124,711.80-72,315.55

Finding the Fourth Proportional to 83,141.20, 124,711.80 and 72,315.55

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Solution

The fourth proportional to 83,141.20, 124,711.80 and 72,315.55 is: 108,473.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,141.20 : 124,711.80 = 72,315.55 : x
  2. Step 2: Convert to fraction form
    83,141.20/124,711.80 = 72,315.55/x
  3. Step 3: Cross multiply
    83,141.20x = 124,711.80 × 72,315.55
  4. Step 4: Simplify right side
    83,141.20x = 9,018,602,408.49
  5. Step 5: Solve for x
    x = 9,018,602,408.49/83,141.20
  6. Step 6: Final answer
    x = 108,473.33

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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.