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Finding the Fourth Proportional to 118,154.16, 177,258.97 and 72,612.61

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Solution

The fourth proportional to 118,154.16, 177,258.97 and 72,612.61 is: 108,935.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,154.16 : 177,258.97 = 72,612.61 : x
  2. Step 2: Convert to fraction form
    118,154.16/177,258.97 = 72,612.61/x
  3. Step 3: Cross multiply
    118,154.16x = 177,258.97 × 72,612.61
  4. Step 4: Simplify right side
    118,154.16x = 12,871,237,249.47
  5. Step 5: Solve for x
    x = 12,871,237,249.47/118,154.16
  6. Step 6: Final answer
    x = 108,935.97

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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.