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Finding the Fourth Proportional to 71,486.76, 98,648.10 and 39,654.98

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Solution

The fourth proportional to 71,486.76, 98,648.10 and 39,654.98 is: 54,721.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,486.76 : 98,648.10 = 39,654.98 : x
  2. Step 2: Convert to fraction form
    71,486.76/98,648.10 = 39,654.98/x
  3. Step 3: Cross multiply
    71,486.76x = 98,648.10 × 39,654.98
  4. Step 4: Simplify right side
    71,486.76x = 3,911,887,939.30
  5. Step 5: Solve for x
    x = 3,911,887,939.30/71,486.76
  6. Step 6: Final answer
    x = 54,721.85

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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.