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Finding the Fourth Proportional to 128,781.76, 193,132.64 and 62,180.48

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Solution

The fourth proportional to 128,781.76, 193,132.64 and 62,180.48 is: 93,251.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,781.76 : 193,132.64 = 62,180.48 : x
  2. Step 2: Convert to fraction form
    128,781.76/193,132.64 = 62,180.48/x
  3. Step 3: Cross multiply
    128,781.76x = 193,132.64 × 62,180.48
  4. Step 4: Simplify right side
    128,781.76x = 12,009,080,258.87
  5. Step 5: Solve for x
    x = 12,009,080,258.87/128,781.76
  6. Step 6: Final answer
    x = 93,251.41

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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.