Home / 80,949.40-121,424.10-75,765.40

Finding the Fourth Proportional to 80,949.40, 121,424.10 and 75,765.40

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Solution

The fourth proportional to 80,949.40, 121,424.10 and 75,765.40 is: 113,648.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,949.40 : 121,424.10 = 75,765.40 : x
  2. Step 2: Convert to fraction form
    80,949.40/121,424.10 = 75,765.40/x
  3. Step 3: Cross multiply
    80,949.40x = 121,424.10 × 75,765.40
  4. Step 4: Simplify right side
    80,949.40x = 9,199,745,506.14
  5. Step 5: Solve for x
    x = 9,199,745,506.14/80,949.40
  6. Step 6: Final answer
    x = 113,648.10

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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.