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Finding the Fourth Proportional to 243,128.88, 335,534.76 and 135,719.88

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Solution

The fourth proportional to 243,128.88, 335,534.76 and 135,719.88 is: 187,302.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,128.88 : 335,534.76 = 135,719.88 : x
  2. Step 2: Convert to fraction form
    243,128.88/335,534.76 = 135,719.88/x
  3. Step 3: Cross multiply
    243,128.88x = 335,534.76 × 135,719.88
  4. Step 4: Simplify right side
    243,128.88x = 45,538,737,363.03
  5. Step 5: Solve for x
    x = 45,538,737,363.03/243,128.88
  6. Step 6: Final answer
    x = 187,302.87

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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.