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Finding the Fourth Proportional to 143,892.12, 198,585.90 and 86,549.88

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Solution

The fourth proportional to 143,892.12, 198,585.90 and 86,549.88 is: 119,447.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,892.12 : 198,585.90 = 86,549.88 : x
  2. Step 2: Convert to fraction form
    143,892.12/198,585.90 = 86,549.88/x
  3. Step 3: Cross multiply
    143,892.12x = 198,585.90 × 86,549.88
  4. Step 4: Simplify right side
    143,892.12x = 17,187,585,814.69
  5. Step 5: Solve for x
    x = 17,187,585,814.69/143,892.12
  6. Step 6: Final answer
    x = 119,447.72

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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.