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Finding the Fourth Proportional to 83,717.80, 125,576.70 and 21,388.30

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Solution

The fourth proportional to 83,717.80, 125,576.70 and 21,388.30 is: 32,082.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,717.80 : 125,576.70 = 21,388.30 : x
  2. Step 2: Convert to fraction form
    83,717.80/125,576.70 = 21,388.30/x
  3. Step 3: Cross multiply
    83,717.80x = 125,576.70 × 21,388.30
  4. Step 4: Simplify right side
    83,717.80x = 2,685,872,132.61
  5. Step 5: Solve for x
    x = 2,685,872,132.61/83,717.80
  6. Step 6: Final answer
    x = 32,082.45

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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.