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Finding the Fourth Proportional to 61,613.32, 85,020 and 45,489.20

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Solution

The fourth proportional to 61,613.32, 85,020 and 45,489.20 is: 62,770.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,613.32 : 85,020 = 45,489.20 : x
  2. Step 2: Convert to fraction form
    61,613.32/85,020 = 45,489.20/x
  3. Step 3: Cross multiply
    61,613.32x = 85,020 × 45,489.20
  4. Step 4: Simplify right side
    61,613.32x = 3,867,491,784.00
  5. Step 5: Solve for x
    x = 3,867,491,784.00/61,613.32
  6. Step 6: Final answer
    x = 62,770.38

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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.