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Finding the Fourth Proportional to 109,899.88, 151,665.44 and 71,684.44

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Solution

The fourth proportional to 109,899.88, 151,665.44 and 71,684.44 is: 98,926.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,899.88 : 151,665.44 = 71,684.44 : x
  2. Step 2: Convert to fraction form
    109,899.88/151,665.44 = 71,684.44/x
  3. Step 3: Cross multiply
    109,899.88x = 151,665.44 × 71,684.44
  4. Step 4: Simplify right side
    109,899.88x = 10,872,052,133.75
  5. Step 5: Solve for x
    x = 10,872,052,133.75/109,899.88
  6. Step 6: Final answer
    x = 98,926.88

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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.