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Finding the Fourth Proportional to 191,959.08, 287,815.28 and 79,716.72

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Solution

The fourth proportional to 191,959.08, 287,815.28 and 79,716.72 is: 119,523.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,959.08 : 287,815.28 = 79,716.72 : x
  2. Step 2: Convert to fraction form
    191,959.08/287,815.28 = 79,716.72/x
  3. Step 3: Cross multiply
    191,959.08x = 287,815.28 × 79,716.72
  4. Step 4: Simplify right side
    191,959.08x = 22,943,690,087.48
  5. Step 5: Solve for x
    x = 22,943,690,087.48/191,959.08
  6. Step 6: Final answer
    x = 119,523.86

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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.