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Finding the Fourth Proportional to 71,581.52, 98,779.20 and 39,752.44

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Solution

The fourth proportional to 71,581.52, 98,779.20 and 39,752.44 is: 54,856.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,581.52 : 98,779.20 = 39,752.44 : x
  2. Step 2: Convert to fraction form
    71,581.52/98,779.20 = 39,752.44/x
  3. Step 3: Cross multiply
    71,581.52x = 98,779.20 × 39,752.44
  4. Step 4: Simplify right side
    71,581.52x = 3,926,714,221.25
  5. Step 5: Solve for x
    x = 3,926,714,221.25/71,581.52
  6. Step 6: Final answer
    x = 54,856.54

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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.