Home / 142,040.88-196,010.68-78,377.85

Finding the Fourth Proportional to 142,040.88, 196,010.68 and 78,377.85

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Solution

The fourth proportional to 142,040.88, 196,010.68 and 78,377.85 is: 108,158.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,040.88 : 196,010.68 = 78,377.85 : x
  2. Step 2: Convert to fraction form
    142,040.88/196,010.68 = 78,377.85/x
  3. Step 3: Cross multiply
    142,040.88x = 196,010.68 × 78,377.85
  4. Step 4: Simplify right side
    142,040.88x = 15,362,895,675.44
  5. Step 5: Solve for x
    x = 15,362,895,675.44/142,040.88
  6. Step 6: Final answer
    x = 108,158.27

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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.