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Finding the Fourth Proportional to 60,978.16, 91,407.74 and 25,449.70

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Solution

The fourth proportional to 60,978.16, 91,407.74 and 25,449.70 is: 38,149.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,978.16 : 91,407.74 = 25,449.70 : x
  2. Step 2: Convert to fraction form
    60,978.16/91,407.74 = 25,449.70/x
  3. Step 3: Cross multiply
    60,978.16x = 91,407.74 × 25,449.70
  4. Step 4: Simplify right side
    60,978.16x = 2,326,299,560.68
  5. Step 5: Solve for x
    x = 2,326,299,560.68/60,978.16
  6. Step 6: Final answer
    x = 38,149.72

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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.