Home / 72,189.20-108,168.60-60,438.80

Finding the Fourth Proportional to 72,189.20, 108,168.60 and 60,438.80

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Solution

The fourth proportional to 72,189.20, 108,168.60 and 60,438.80 is: 90,561.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,189.20 : 108,168.60 = 60,438.80 : x
  2. Step 2: Convert to fraction form
    72,189.20/108,168.60 = 60,438.80/x
  3. Step 3: Cross multiply
    72,189.20x = 108,168.60 × 60,438.80
  4. Step 4: Simplify right side
    72,189.20x = 6,537,580,381.68
  5. Step 5: Solve for x
    x = 6,537,580,381.68/72,189.20
  6. Step 6: Final answer
    x = 90,561.75

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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.