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Finding the Fourth Proportional to 239,049.44, 358,502.88 and 81,242

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Solution

The fourth proportional to 239,049.44, 358,502.88 and 81,242 is: 121,838.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,049.44 : 358,502.88 = 81,242 : x
  2. Step 2: Convert to fraction form
    239,049.44/358,502.88 = 81,242/x
  3. Step 3: Cross multiply
    239,049.44x = 358,502.88 × 81,242
  4. Step 4: Simplify right side
    239,049.44x = 29,125,490,976.96
  5. Step 5: Solve for x
    x = 29,125,490,976.96/239,049.44
  6. Step 6: Final answer
    x = 121,838.78

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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.