Home / 115,986.56-160,138.20-89,080.78

Finding the Fourth Proportional to 115,986.56, 160,138.20 and 89,080.78

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Solution

The fourth proportional to 115,986.56, 160,138.20 and 89,080.78 is: 122,990.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,986.56 : 160,138.20 = 89,080.78 : x
  2. Step 2: Convert to fraction form
    115,986.56/160,138.20 = 89,080.78/x
  3. Step 3: Cross multiply
    115,986.56x = 160,138.20 × 89,080.78
  4. Step 4: Simplify right side
    115,986.56x = 14,265,235,763.80
  5. Step 5: Solve for x
    x = 14,265,235,763.80/115,986.56
  6. Step 6: Final answer
    x = 122,990.42

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1.5x scale

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.