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Finding the Fourth Proportional to 100,373.30, 138,167.42 and 86,755.10

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Solution

The fourth proportional to 100,373.30, 138,167.42 and 86,755.10 is: 119,421.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,373.30 : 138,167.42 = 86,755.10 : x
  2. Step 2: Convert to fraction form
    100,373.30/138,167.42 = 86,755.10/x
  3. Step 3: Cross multiply
    100,373.30x = 138,167.42 × 86,755.10
  4. Step 4: Simplify right side
    100,373.30x = 11,986,728,338.84
  5. Step 5: Solve for x
    x = 11,986,728,338.84/100,373.30
  6. Step 6: Final answer
    x = 119,421.48

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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.