Home / 90,980.57-136,567.89-80,517.13

Finding the Fourth Proportional to 90,980.57, 136,567.89 and 80,517.13

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Solution

The fourth proportional to 90,980.57, 136,567.89 and 80,517.13 is: 120,861.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,980.57 : 136,567.89 = 80,517.13 : x
  2. Step 2: Convert to fraction form
    90,980.57/136,567.89 = 80,517.13/x
  3. Step 3: Cross multiply
    90,980.57x = 136,567.89 × 80,517.13
  4. Step 4: Simplify right side
    90,980.57x = 10,996,054,211.54
  5. Step 5: Solve for x
    x = 10,996,054,211.54/90,980.57
  6. Step 6: Final answer
    x = 120,861.56

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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.