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Finding the Fourth Proportional to 98,575.72, 135,987.08 and 64,569.52

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Solution

The fourth proportional to 98,575.72, 135,987.08 and 64,569.52 is: 89,074.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,575.72 : 135,987.08 = 64,569.52 : x
  2. Step 2: Convert to fraction form
    98,575.72/135,987.08 = 64,569.52/x
  3. Step 3: Cross multiply
    98,575.72x = 135,987.08 × 64,569.52
  4. Step 4: Simplify right side
    98,575.72x = 8,780,620,481.80
  5. Step 5: Solve for x
    x = 8,780,620,481.80/98,575.72
  6. Step 6: Final answer
    x = 89,074.88

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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.