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Finding the Fourth Proportional to 61,639.14, 85,059 and 36,142.08

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Solution

The fourth proportional to 61,639.14, 85,059 and 36,142.08 is: 49,874.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,639.14 : 85,059 = 36,142.08 : x
  2. Step 2: Convert to fraction form
    61,639.14/85,059 = 36,142.08/x
  3. Step 3: Cross multiply
    61,639.14x = 85,059 × 36,142.08
  4. Step 4: Simplify right side
    61,639.14x = 3,074,209,182.72
  5. Step 5: Solve for x
    x = 3,074,209,182.72/61,639.14
  6. Step 6: Final answer
    x = 49,874.30

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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.