Home / 142,020.30-195,999.72-80,785.68

Finding the Fourth Proportional to 142,020.30, 195,999.72 and 80,785.68

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Solution

The fourth proportional to 142,020.30, 195,999.72 and 80,785.68 is: 111,490.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,020.30 : 195,999.72 = 80,785.68 : x
  2. Step 2: Convert to fraction form
    142,020.30/195,999.72 = 80,785.68/x
  3. Step 3: Cross multiply
    142,020.30x = 195,999.72 × 80,785.68
  4. Step 4: Simplify right side
    142,020.30x = 15,833,970,660.01
  5. Step 5: Solve for x
    x = 15,833,970,660.01/142,020.30
  6. Step 6: Final answer
    x = 111,490.90

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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.