Home / 91,559.70-137,178.09-80,188.18

Finding the Fourth Proportional to 91,559.70, 137,178.09 and 80,188.18

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Solution

The fourth proportional to 91,559.70, 137,178.09 and 80,188.18 is: 120,140.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,559.70 : 137,178.09 = 80,188.18 : x
  2. Step 2: Convert to fraction form
    91,559.70/137,178.09 = 80,188.18/x
  3. Step 3: Cross multiply
    91,559.70x = 137,178.09 × 80,188.18
  4. Step 4: Simplify right side
    91,559.70x = 11,000,061,030.03
  5. Step 5: Solve for x
    x = 11,000,061,030.03/91,559.70
  6. Step 6: Final answer
    x = 120,140.86

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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.