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Finding the Fourth Proportional to 140,062.15, 209,927.17 and 80,775.42

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Solution

The fourth proportional to 140,062.15, 209,927.17 and 80,775.42 is: 121,067.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,062.15 : 209,927.17 = 80,775.42 : x
  2. Step 2: Convert to fraction form
    140,062.15/209,927.17 = 80,775.42/x
  3. Step 3: Cross multiply
    140,062.15x = 209,927.17 × 80,775.42
  4. Step 4: Simplify right side
    140,062.15x = 16,956,955,326.16
  5. Step 5: Solve for x
    x = 16,956,955,326.16/140,062.15
  6. Step 6: Final answer
    x = 121,067.36

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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.