Home / 142,040.70-196,020.30-78,382.62

Finding the Fourth Proportional to 142,040.70, 196,020.30 and 78,382.62

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Solution

The fourth proportional to 142,040.70, 196,020.30 and 78,382.62 is: 108,170.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,040.70 : 196,020.30 = 78,382.62 : x
  2. Step 2: Convert to fraction form
    142,040.70/196,020.30 = 78,382.62/x
  3. Step 3: Cross multiply
    142,040.70x = 196,020.30 × 78,382.62
  4. Step 4: Simplify right side
    142,040.70x = 15,364,584,687.19
  5. Step 5: Solve for x
    x = 15,364,584,687.19/142,040.70
  6. Step 6: Final answer
    x = 108,170.30

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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.