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Finding the Fourth Proportional to 215,813.70, 323,708.61 and 66,053.88

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Solution

The fourth proportional to 215,813.70, 323,708.61 and 66,053.88 is: 99,077.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,813.70 : 323,708.61 = 66,053.88 : x
  2. Step 2: Convert to fraction form
    215,813.70/323,708.61 = 66,053.88/x
  3. Step 3: Cross multiply
    215,813.70x = 323,708.61 × 66,053.88
  4. Step 4: Simplify right side
    215,813.70x = 21,382,209,679.91
  5. Step 5: Solve for x
    x = 21,382,209,679.91/215,813.70
  6. Step 6: Final answer
    x = 99,077.17

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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.