Home / 272,856.20-409,329.10-85,822.60

Finding the Fourth Proportional to 272,856.20, 409,329.10 and 85,822.60

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Solution

The fourth proportional to 272,856.20, 409,329.10 and 85,822.60 is: 128,747.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,856.20 : 409,329.10 = 85,822.60 : x
  2. Step 2: Convert to fraction form
    272,856.20/409,329.10 = 85,822.60/x
  3. Step 3: Cross multiply
    272,856.20x = 409,329.10 × 85,822.60
  4. Step 4: Simplify right side
    272,856.20x = 35,129,687,617.66
  5. Step 5: Solve for x
    x = 35,129,687,617.66/272,856.20
  6. Step 6: Final answer
    x = 128,747.99

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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.