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Finding the Fourth Proportional to 368,691.06, 552,902.66 and 128,737.56

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Solution

The fourth proportional to 368,691.06, 552,902.66 and 128,737.56 is: 193,059.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,691.06 : 552,902.66 = 128,737.56 : x
  2. Step 2: Convert to fraction form
    368,691.06/552,902.66 = 128,737.56/x
  3. Step 3: Cross multiply
    368,691.06x = 552,902.66 × 128,737.56
  4. Step 4: Simplify right side
    368,691.06x = 71,179,339,365.91
  5. Step 5: Solve for x
    x = 71,179,339,365.91/368,691.06
  6. Step 6: Final answer
    x = 193,059.58

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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.