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Finding the Fourth Proportional to 143,559.78, 198,067.88 and 81,460.08

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Solution

The fourth proportional to 143,559.78, 198,067.88 and 81,460.08 is: 112,389.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,559.78 : 198,067.88 = 81,460.08 : x
  2. Step 2: Convert to fraction form
    143,559.78/198,067.88 = 81,460.08/x
  3. Step 3: Cross multiply
    143,559.78x = 198,067.88 × 81,460.08
  4. Step 4: Simplify right side
    143,559.78x = 16,134,625,350.23
  5. Step 5: Solve for x
    x = 16,134,625,350.23/143,559.78
  6. Step 6: Final answer
    x = 112,389.59

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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.