Home / 90,851.20-136,507.20-80,713.60

Finding the Fourth Proportional to 90,851.20, 136,507.20 and 80,713.60

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Solution

The fourth proportional to 90,851.20, 136,507.20 and 80,713.60 is: 121,275.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,851.20 : 136,507.20 = 80,713.60 : x
  2. Step 2: Convert to fraction form
    90,851.20/136,507.20 = 80,713.60/x
  3. Step 3: Cross multiply
    90,851.20x = 136,507.20 × 80,713.60
  4. Step 4: Simplify right side
    90,851.20x = 11,017,987,537.92
  5. Step 5: Solve for x
    x = 11,017,987,537.92/90,851.20
  6. Step 6: Final answer
    x = 121,275.09

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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.