Home / 91,215.20-136,563.60-80,847.20

Finding the Fourth Proportional to 91,215.20, 136,563.60 and 80,847.20

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Solution

The fourth proportional to 91,215.20, 136,563.60 and 80,847.20 is: 121,041.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,215.20 : 136,563.60 = 80,847.20 : x
  2. Step 2: Convert to fraction form
    91,215.20/136,563.60 = 80,847.20/x
  3. Step 3: Cross multiply
    91,215.20x = 136,563.60 × 80,847.20
  4. Step 4: Simplify right side
    91,215.20x = 11,040,784,681.92
  5. Step 5: Solve for x
    x = 11,040,784,681.92/91,215.20
  6. Step 6: Final answer
    x = 121,041.06

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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.