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Finding the Fourth Proportional to 119,876.20, 179,619.90 and 75,423.40

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Solution

The fourth proportional to 119,876.20, 179,619.90 and 75,423.40 is: 113,012.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,876.20 : 179,619.90 = 75,423.40 : x
  2. Step 2: Convert to fraction form
    119,876.20/179,619.90 = 75,423.40/x
  3. Step 3: Cross multiply
    119,876.20x = 179,619.90 × 75,423.40
  4. Step 4: Simplify right side
    119,876.20x = 13,547,543,565.66
  5. Step 5: Solve for x
    x = 13,547,543,565.66/119,876.20
  6. Step 6: Final answer
    x = 113,012.79

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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.