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Finding the Fourth Proportional to 61,805.40, 92,708.10 and 61,149.30

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Solution

The fourth proportional to 61,805.40, 92,708.10 and 61,149.30 is: 91,723.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,805.40 : 92,708.10 = 61,149.30 : x
  2. Step 2: Convert to fraction form
    61,805.40/92,708.10 = 61,149.30/x
  3. Step 3: Cross multiply
    61,805.40x = 92,708.10 × 61,149.30
  4. Step 4: Simplify right side
    61,805.40x = 5,669,035,419.33
  5. Step 5: Solve for x
    x = 5,669,035,419.33/61,805.40
  6. Step 6: Final answer
    x = 91,723.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.