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Finding the Fourth Proportional to 62,221.52, 85,865.70 and 39,865.52

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Solution

The fourth proportional to 62,221.52, 85,865.70 and 39,865.52 is: 55,014.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,221.52 : 85,865.70 = 39,865.52 : x
  2. Step 2: Convert to fraction form
    62,221.52/85,865.70 = 39,865.52/x
  3. Step 3: Cross multiply
    62,221.52x = 85,865.70 × 39,865.52
  4. Step 4: Simplify right side
    62,221.52x = 3,423,080,780.66
  5. Step 5: Solve for x
    x = 3,423,080,780.66/62,221.52
  6. Step 6: Final answer
    x = 55,014.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.