Home / 90,123.18-135,216.90-40,198.80

Finding the Fourth Proportional to 90,123.18, 135,216.90 and 40,198.80

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Solution

The fourth proportional to 90,123.18, 135,216.90 and 40,198.80 is: 60,312.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,123.18 : 135,216.90 = 40,198.80 : x
  2. Step 2: Convert to fraction form
    90,123.18/135,216.90 = 40,198.80/x
  3. Step 3: Cross multiply
    90,123.18x = 135,216.90 × 40,198.80
  4. Step 4: Simplify right side
    90,123.18x = 5,435,557,119.72
  5. Step 5: Solve for x
    x = 5,435,557,119.72/90,123.18
  6. Step 6: Final answer
    x = 60,312.53

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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.