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Finding the Fourth Proportional to 71,514.78, 98,693.79 and 39,683.91

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Solution

The fourth proportional to 71,514.78, 98,693.79 and 39,683.91 is: 54,765.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,514.78 : 98,693.79 = 39,683.91 : x
  2. Step 2: Convert to fraction form
    71,514.78/98,693.79 = 39,683.91/x
  3. Step 3: Cross multiply
    71,514.78x = 98,693.79 × 39,683.91
  4. Step 4: Simplify right side
    71,514.78x = 3,916,555,479.92
  5. Step 5: Solve for x
    x = 3,916,555,479.92/71,514.78
  6. Step 6: Final answer
    x = 54,765.68

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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.