Home / 121,142.43-181,722.87-36,909.78

Finding the Fourth Proportional to 121,142.43, 181,722.87 and 36,909.78

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Solution

The fourth proportional to 121,142.43, 181,722.87 and 36,909.78 is: 55,367.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,142.43 : 181,722.87 = 36,909.78 : x
  2. Step 2: Convert to fraction form
    121,142.43/181,722.87 = 36,909.78/x
  3. Step 3: Cross multiply
    121,142.43x = 181,722.87 × 36,909.78
  4. Step 4: Simplify right side
    121,142.43x = 6,707,351,152.67
  5. Step 5: Solve for x
    x = 6,707,351,152.67/121,142.43
  6. Step 6: Final answer
    x = 55,367.48

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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.