Home / 80,964.96-111,740.40-49,135.20

Finding the Fourth Proportional to 80,964.96, 111,740.40 and 49,135.20

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Solution

The fourth proportional to 80,964.96, 111,740.40 and 49,135.20 is: 67,811.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,964.96 : 111,740.40 = 49,135.20 : x
  2. Step 2: Convert to fraction form
    80,964.96/111,740.40 = 49,135.20/x
  3. Step 3: Cross multiply
    80,964.96x = 111,740.40 × 49,135.20
  4. Step 4: Simplify right side
    80,964.96x = 5,490,386,902.08
  5. Step 5: Solve for x
    x = 5,490,386,902.08/80,964.96
  6. Step 6: Final answer
    x = 67,811.89

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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.