Home / 137,631.20-206,576.40-85,143.20

Finding the Fourth Proportional to 137,631.20, 206,576.40 and 85,143.20

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Solution

The fourth proportional to 137,631.20, 206,576.40 and 85,143.20 is: 127,794.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,631.20 : 206,576.40 = 85,143.20 : x
  2. Step 2: Convert to fraction form
    137,631.20/206,576.40 = 85,143.20/x
  3. Step 3: Cross multiply
    137,631.20x = 206,576.40 × 85,143.20
  4. Step 4: Simplify right side
    137,631.20x = 17,588,575,740.48
  5. Step 5: Solve for x
    x = 17,588,575,740.48/137,631.20
  6. Step 6: Final answer
    x = 127,794.97

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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.