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Finding the Fourth Proportional to 90,766.40, 136,034.40 and 80,859.20

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Solution

The fourth proportional to 90,766.40, 136,034.40 and 80,859.20 is: 121,186.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,766.40 : 136,034.40 = 80,859.20 : x
  2. Step 2: Convert to fraction form
    90,766.40/136,034.40 = 80,859.20/x
  3. Step 3: Cross multiply
    90,766.40x = 136,034.40 × 80,859.20
  4. Step 4: Simplify right side
    90,766.40x = 10,999,632,756.48
  5. Step 5: Solve for x
    x = 10,999,632,756.48/90,766.40
  6. Step 6: Final answer
    x = 121,186.17

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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.