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Finding the Fourth Proportional to 205,473.68, 308,087.52 and 85,385.82

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Solution

The fourth proportional to 205,473.68, 308,087.52 and 85,385.82 is: 128,027.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,473.68 : 308,087.52 = 85,385.82 : x
  2. Step 2: Convert to fraction form
    205,473.68/308,087.52 = 85,385.82/x
  3. Step 3: Cross multiply
    205,473.68x = 308,087.52 × 85,385.82
  4. Step 4: Simplify right side
    205,473.68x = 26,306,305,526.97
  5. Step 5: Solve for x
    x = 26,306,305,526.97/205,473.68
  6. Step 6: Final answer
    x = 128,027.62

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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.