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Finding the Fourth Proportional to 243,238.56, 335,725.20 and 142,668.96

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Solution

The fourth proportional to 243,238.56, 335,725.20 and 142,668.96 is: 196,916.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,238.56 : 335,725.20 = 142,668.96 : x
  2. Step 2: Convert to fraction form
    243,238.56/335,725.20 = 142,668.96/x
  3. Step 3: Cross multiply
    243,238.56x = 335,725.20 × 142,668.96
  4. Step 4: Simplify right side
    243,238.56x = 47,897,565,129.79
  5. Step 5: Solve for x
    x = 47,897,565,129.79/243,238.56
  6. Step 6: Final answer
    x = 196,916.00

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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.