Home / 60,086.72-90,136.20-20,638.72

Finding the Fourth Proportional to 60,086.72, 90,136.20 and 20,638.72

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Solution

The fourth proportional to 60,086.72, 90,136.20 and 20,638.72 is: 30,960.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,086.72 : 90,136.20 = 20,638.72 : x
  2. Step 2: Convert to fraction form
    60,086.72/90,136.20 = 20,638.72/x
  3. Step 3: Cross multiply
    60,086.72x = 90,136.20 × 20,638.72
  4. Step 4: Simplify right side
    60,086.72x = 1,860,295,793.66
  5. Step 5: Solve for x
    x = 1,860,295,793.66/60,086.72
  6. Step 6: Final answer
    x = 30,960.18

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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.