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Finding the Fourth Proportional to 136,042.93, 187,310.43 and 123,431.58

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Solution

The fourth proportional to 136,042.93, 187,310.43 and 123,431.58 is: 169,946.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,042.93 : 187,310.43 = 123,431.58 : x
  2. Step 2: Convert to fraction form
    136,042.93/187,310.43 = 123,431.58/x
  3. Step 3: Cross multiply
    136,042.93x = 187,310.43 × 123,431.58
  4. Step 4: Simplify right side
    136,042.93x = 23,120,022,325.38
  5. Step 5: Solve for x
    x = 23,120,022,325.38/136,042.93
  6. Step 6: Final answer
    x = 169,946.52

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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.