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Finding the Fourth Proportional to 272,932.80, 409,456.80 and 85,963.20

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Solution

The fourth proportional to 272,932.80, 409,456.80 and 85,963.20 is: 128,962.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,932.80 : 409,456.80 = 85,963.20 : x
  2. Step 2: Convert to fraction form
    272,932.80/409,456.80 = 85,963.20/x
  3. Step 3: Cross multiply
    272,932.80x = 409,456.80 × 85,963.20
  4. Step 4: Simplify right side
    272,932.80x = 35,198,216,789.76
  5. Step 5: Solve for x
    x = 35,198,216,789.76/272,932.80
  6. Step 6: Final answer
    x = 128,962.94

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1.5x scale

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.