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Finding the Fourth Proportional to 61,489.20, 92,104.20 and 51,121.20

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Solution

The fourth proportional to 61,489.20, 92,104.20 and 51,121.20 is: 76,574.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,489.20 : 92,104.20 = 51,121.20 : x
  2. Step 2: Convert to fraction form
    61,489.20/92,104.20 = 51,121.20/x
  3. Step 3: Cross multiply
    61,489.20x = 92,104.20 × 51,121.20
  4. Step 4: Simplify right side
    61,489.20x = 4,708,477,229.04
  5. Step 5: Solve for x
    x = 4,708,477,229.04/61,489.20
  6. Step 6: Final answer
    x = 76,574.05

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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.