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Finding the Fourth Proportional to 83,244.78, 124,866.09 and 20,915.28

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Solution

The fourth proportional to 83,244.78, 124,866.09 and 20,915.28 is: 31,372.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,244.78 : 124,866.09 = 20,915.28 : x
  2. Step 2: Convert to fraction form
    83,244.78/124,866.09 = 20,915.28/x
  3. Step 3: Cross multiply
    83,244.78x = 124,866.09 × 20,915.28
  4. Step 4: Simplify right side
    83,244.78x = 2,611,609,234.86
  5. Step 5: Solve for x
    x = 2,611,609,234.86/83,244.78
  6. Step 6: Final answer
    x = 31,372.65

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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.