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Finding the Fourth Proportional to 272,835.60, 409,253.40 and 85,822.80

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Solution

The fourth proportional to 272,835.60, 409,253.40 and 85,822.80 is: 128,734.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,835.60 : 409,253.40 = 85,822.80 : x
  2. Step 2: Convert to fraction form
    272,835.60/409,253.40 = 85,822.80/x
  3. Step 3: Cross multiply
    272,835.60x = 409,253.40 × 85,822.80
  4. Step 4: Simplify right side
    272,835.60x = 35,123,272,697.52
  5. Step 5: Solve for x
    x = 35,123,272,697.52/272,835.60
  6. Step 6: Final answer
    x = 128,734.20

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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.