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Finding the Fourth Proportional to 243,139.76, 335,536.56 and 135,717.96

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Solution

The fourth proportional to 243,139.76, 335,536.56 and 135,717.96 is: 187,292.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,139.76 : 335,536.56 = 135,717.96 : x
  2. Step 2: Convert to fraction form
    243,139.76/335,536.56 = 135,717.96/x
  3. Step 3: Cross multiply
    243,139.76x = 335,536.56 × 135,717.96
  4. Step 4: Simplify right side
    243,139.76x = 45,538,338,686.88
  5. Step 5: Solve for x
    x = 45,538,338,686.88/243,139.76
  6. Step 6: Final answer
    x = 187,292.85

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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.