Home / 142,001.06-195,961.44-78,338.85

Finding the Fourth Proportional to 142,001.06, 195,961.44 and 78,338.85

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Solution

The fourth proportional to 142,001.06, 195,961.44 and 78,338.85 is: 108,107.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,001.06 : 195,961.44 = 78,338.85 : x
  2. Step 2: Convert to fraction form
    142,001.06/195,961.44 = 78,338.85/x
  3. Step 3: Cross multiply
    142,001.06x = 195,961.44 × 78,338.85
  4. Step 4: Simplify right side
    142,001.06x = 15,351,393,853.94
  5. Step 5: Solve for x
    x = 15,351,393,853.94/142,001.06
  6. Step 6: Final answer
    x = 108,107.60

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1.5x scale

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.