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Finding the Fourth Proportional to 159,576.78, 239,161.65 and 84,732.78

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Solution

The fourth proportional to 159,576.78, 239,161.65 and 84,732.78 is: 126,991.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,576.78 : 239,161.65 = 84,732.78 : x
  2. Step 2: Convert to fraction form
    159,576.78/239,161.65 = 84,732.78/x
  3. Step 3: Cross multiply
    159,576.78x = 239,161.65 × 84,732.78
  4. Step 4: Simplify right side
    159,576.78x = 20,264,831,473.89
  5. Step 5: Solve for x
    x = 20,264,831,473.89/159,576.78
  6. Step 6: Final answer
    x = 126,991.10

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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.