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Finding the Fourth Proportional to 83,658.45, 125,487.67 and 21,328.95

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Solution

The fourth proportional to 83,658.45, 125,487.67 and 21,328.95 is: 31,993.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,658.45 : 125,487.67 = 21,328.95 : x
  2. Step 2: Convert to fraction form
    83,658.45/125,487.67 = 21,328.95/x
  3. Step 3: Cross multiply
    83,658.45x = 125,487.67 × 21,328.95
  4. Step 4: Simplify right side
    83,658.45x = 2,676,519,607.50
  5. Step 5: Solve for x
    x = 2,676,519,607.50/83,658.45
  6. Step 6: Final answer
    x = 31,993.42

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Similar ratio
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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.