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Finding the Fourth Proportional to 83,516.48, 125,274.48 and 21,186.80

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Solution

The fourth proportional to 83,516.48, 125,274.48 and 21,186.80 is: 31,780.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,516.48 : 125,274.48 = 21,186.80 : x
  2. Step 2: Convert to fraction form
    83,516.48/125,274.48 = 21,186.80/x
  3. Step 3: Cross multiply
    83,516.48x = 125,274.48 × 21,186.80
  4. Step 4: Simplify right side
    83,516.48x = 2,654,165,352.86
  5. Step 5: Solve for x
    x = 2,654,165,352.86/83,516.48
  6. Step 6: Final answer
    x = 31,780.14

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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.