Home / 139,543.08-192,563.60-79,117.78

Finding the Fourth Proportional to 139,543.08, 192,563.60 and 79,117.78

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Solution

The fourth proportional to 139,543.08, 192,563.60 and 79,117.78 is: 109,179.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,543.08 : 192,563.60 = 79,117.78 : x
  2. Step 2: Convert to fraction form
    139,543.08/192,563.60 = 79,117.78/x
  3. Step 3: Cross multiply
    139,543.08x = 192,563.60 × 79,117.78
  4. Step 4: Simplify right side
    139,543.08x = 15,235,204,540.81
  5. Step 5: Solve for x
    x = 15,235,204,540.81/139,543.08
  6. Step 6: Final answer
    x = 109,179.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.