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Finding the Fourth Proportional to 128,098, 176,761.81 and 74,372.52

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Solution

The fourth proportional to 128,098, 176,761.81 and 74,372.52 is: 102,626.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,098 : 176,761.81 = 74,372.52 : x
  2. Step 2: Convert to fraction form
    128,098/176,761.81 = 74,372.52/x
  3. Step 3: Cross multiply
    128,098x = 176,761.81 × 74,372.52
  4. Step 4: Simplify right side
    128,098x = 13,146,220,877.60
  5. Step 5: Solve for x
    x = 13,146,220,877.60/128,098
  6. Step 6: Final answer
    x = 102,626.28

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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.