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Finding the Fourth Proportional to 154,042.56, 231,101.76 and 90,914.88

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Solution

The fourth proportional to 154,042.56, 231,101.76 and 90,914.88 is: 136,394.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,042.56 : 231,101.76 = 90,914.88 : x
  2. Step 2: Convert to fraction form
    154,042.56/231,101.76 = 90,914.88/x
  3. Step 3: Cross multiply
    154,042.56x = 231,101.76 × 90,914.88
  4. Step 4: Simplify right side
    154,042.56x = 21,010,588,778.19
  5. Step 5: Solve for x
    x = 21,010,588,778.19/154,042.56
  6. Step 6: Final answer
    x = 136,394.70

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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.