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Finding the Fourth Proportional to 164,461.20, 246,691.80 and 85,729.20

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Solution

The fourth proportional to 164,461.20, 246,691.80 and 85,729.20 is: 128,593.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,461.20 : 246,691.80 = 85,729.20 : x
  2. Step 2: Convert to fraction form
    164,461.20/246,691.80 = 85,729.20/x
  3. Step 3: Cross multiply
    164,461.20x = 246,691.80 × 85,729.20
  4. Step 4: Simplify right side
    164,461.20x = 21,148,690,660.56
  5. Step 5: Solve for x
    x = 21,148,690,660.56/164,461.20
  6. Step 6: Final answer
    x = 128,593.80

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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.