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Finding the Fourth Proportional to 128,204.78, 176,894.18 and 73,753.61

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Solution

The fourth proportional to 128,204.78, 176,894.18 and 73,753.61 is: 101,763.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,204.78 : 176,894.18 = 73,753.61 : x
  2. Step 2: Convert to fraction form
    128,204.78/176,894.18 = 73,753.61/x
  3. Step 3: Cross multiply
    128,204.78x = 176,894.18 × 73,753.61
  4. Step 4: Simplify right side
    128,204.78x = 13,046,583,109.75
  5. Step 5: Solve for x
    x = 13,046,583,109.75/128,204.78
  6. Step 6: Final answer
    x = 101,763.63

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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.