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Finding the Fourth Proportional to 98,425.61, 135,831.77 and 55,419.90

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Solution

The fourth proportional to 98,425.61, 135,831.77 and 55,419.90 is: 76,481.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,425.61 : 135,831.77 = 55,419.90 : x
  2. Step 2: Convert to fraction form
    98,425.61/135,831.77 = 55,419.90/x
  3. Step 3: Cross multiply
    98,425.61x = 135,831.77 × 55,419.90
  4. Step 4: Simplify right side
    98,425.61x = 7,527,782,531.58
  5. Step 5: Solve for x
    x = 7,527,782,531.58/98,425.61
  6. Step 6: Final answer
    x = 76,481.95

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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.