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Finding the Fourth Proportional to 215,896.59, 323,854.61 and 66,125.97

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Solution

The fourth proportional to 215,896.59, 323,854.61 and 66,125.97 is: 99,191.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,896.59 : 323,854.61 = 66,125.97 : x
  2. Step 2: Convert to fraction form
    215,896.59/323,854.61 = 66,125.97/x
  3. Step 3: Cross multiply
    215,896.59x = 323,854.61 × 66,125.97
  4. Step 4: Simplify right side
    215,896.59x = 21,415,199,894.59
  5. Step 5: Solve for x
    x = 21,415,199,894.59/215,896.59
  6. Step 6: Final answer
    x = 99,191.93

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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.