Home / 80,966.96-111,743.16-49,137.20

Finding the Fourth Proportional to 80,966.96, 111,743.16 and 49,137.20

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Solution

The fourth proportional to 80,966.96, 111,743.16 and 49,137.20 is: 67,814.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,966.96 : 111,743.16 = 49,137.20 : x
  2. Step 2: Convert to fraction form
    80,966.96/111,743.16 = 49,137.20/x
  3. Step 3: Cross multiply
    80,966.96x = 111,743.16 × 49,137.20
  4. Step 4: Simplify right side
    80,966.96x = 5,490,746,001.55
  5. Step 5: Solve for x
    x = 5,490,746,001.55/80,966.96
  6. Step 6: Final answer
    x = 67,814.65

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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.