Home / 123,520.86-170,395.92-78,122.52

Finding the Fourth Proportional to 123,520.86, 170,395.92 and 78,122.52

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Solution

The fourth proportional to 123,520.86, 170,395.92 and 78,122.52 is: 107,769.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,520.86 : 170,395.92 = 78,122.52 : x
  2. Step 2: Convert to fraction form
    123,520.86/170,395.92 = 78,122.52/x
  3. Step 3: Cross multiply
    123,520.86x = 170,395.92 × 78,122.52
  4. Step 4: Simplify right side
    123,520.86x = 13,311,758,668.12
  5. Step 5: Solve for x
    x = 13,311,758,668.12/123,520.86
  6. Step 6: Final answer
    x = 107,769.32

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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.