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Finding the Fourth Proportional to 243,207.81, 335,586.72 and 135,760.50

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Solution

The fourth proportional to 243,207.81, 335,586.72 and 135,760.50 is: 187,327.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,207.81 : 335,586.72 = 135,760.50 : x
  2. Step 2: Convert to fraction form
    243,207.81/335,586.72 = 135,760.50/x
  3. Step 3: Cross multiply
    243,207.81x = 335,586.72 × 135,760.50
  4. Step 4: Simplify right side
    243,207.81x = 45,559,420,900.56
  5. Step 5: Solve for x
    x = 45,559,420,900.56/243,207.81
  6. Step 6: Final answer
    x = 187,327.13

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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.