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Finding the Fourth Proportional to 156,873.73, 216,487.42 and 85,253.75

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Solution

The fourth proportional to 156,873.73, 216,487.42 and 85,253.75 is: 117,651.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,873.73 : 216,487.42 = 85,253.75 : x
  2. Step 2: Convert to fraction form
    156,873.73/216,487.42 = 85,253.75/x
  3. Step 3: Cross multiply
    156,873.73x = 216,487.42 × 85,253.75
  4. Step 4: Simplify right side
    156,873.73x = 18,456,364,382.83
  5. Step 5: Solve for x
    x = 18,456,364,382.83/156,873.73
  6. Step 6: Final answer
    x = 117,651.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.