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Finding the Fourth Proportional to 131,687.49, 181,728.52 and 74,338.89

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Solution

The fourth proportional to 131,687.49, 181,728.52 and 74,338.89 is: 102,587.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,687.49 : 181,728.52 = 74,338.89 : x
  2. Step 2: Convert to fraction form
    131,687.49/181,728.52 = 74,338.89/x
  3. Step 3: Cross multiply
    131,687.49x = 181,728.52 × 74,338.89
  4. Step 4: Simplify right side
    131,687.49x = 13,509,496,458.14
  5. Step 5: Solve for x
    x = 13,509,496,458.14/131,687.49
  6. Step 6: Final answer
    x = 102,587.55

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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.