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Finding the Fourth Proportional to 321,885.01, 482,772.81 and 85,251.61

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Solution

The fourth proportional to 321,885.01, 482,772.81 and 85,251.61 is: 127,862.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,885.01 : 482,772.81 = 85,251.61 : x
  2. Step 2: Convert to fraction form
    321,885.01/482,772.81 = 85,251.61/x
  3. Step 3: Cross multiply
    321,885.01x = 482,772.81 × 85,251.61
  4. Step 4: Simplify right side
    321,885.01x = 41,157,159,316.72
  5. Step 5: Solve for x
    x = 41,157,159,316.72/321,885.01
  6. Step 6: Final answer
    x = 127,862.93

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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.