Home / 80,930.40-121,395.60-72,401.10

Finding the Fourth Proportional to 80,930.40, 121,395.60 and 72,401.10

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Solution

The fourth proportional to 80,930.40, 121,395.60 and 72,401.10 is: 108,601.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,930.40 : 121,395.60 = 72,401.10 : x
  2. Step 2: Convert to fraction form
    80,930.40/121,395.60 = 72,401.10/x
  3. Step 3: Cross multiply
    80,930.40x = 121,395.60 × 72,401.10
  4. Step 4: Simplify right side
    80,930.40x = 8,789,174,975.16
  5. Step 5: Solve for x
    x = 8,789,174,975.16/80,930.40
  6. Step 6: Final answer
    x = 108,601.65

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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.