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Finding the Fourth Proportional to 215,891.61, 323,859.02 and 66,130.17

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Solution

The fourth proportional to 215,891.61, 323,859.02 and 66,130.17 is: 99,201.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,891.61 : 323,859.02 = 66,130.17 : x
  2. Step 2: Convert to fraction form
    215,891.61/323,859.02 = 66,130.17/x
  3. Step 3: Cross multiply
    215,891.61x = 323,859.02 × 66,130.17
  4. Step 4: Simplify right side
    215,891.61x = 21,416,851,717.98
  5. Step 5: Solve for x
    x = 21,416,851,717.98/215,891.61
  6. Step 6: Final answer
    x = 99,201.87

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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.