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Finding the Fourth Proportional to 79,876.80, 119,815.20 and 71,566.20

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Solution

The fourth proportional to 79,876.80, 119,815.20 and 71,566.20 is: 107,349.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,876.80 : 119,815.20 = 71,566.20 : x
  2. Step 2: Convert to fraction form
    79,876.80/119,815.20 = 71,566.20/x
  3. Step 3: Cross multiply
    79,876.80x = 119,815.20 × 71,566.20
  4. Step 4: Simplify right side
    79,876.80x = 8,574,718,566.24
  5. Step 5: Solve for x
    x = 8,574,718,566.24/79,876.80
  6. Step 6: Final answer
    x = 107,349.30

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1.5x scale

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.