Home / 142,089.12-196,081.97-78,426.90

Finding the Fourth Proportional to 142,089.12, 196,081.97 and 78,426.90

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Solution

The fourth proportional to 142,089.12, 196,081.97 and 78,426.90 is: 108,228.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,089.12 : 196,081.97 = 78,426.90 : x
  2. Step 2: Convert to fraction form
    142,089.12/196,081.97 = 78,426.90/x
  3. Step 3: Cross multiply
    142,089.12x = 196,081.97 × 78,426.90
  4. Step 4: Simplify right side
    142,089.12x = 15,378,100,660.86
  5. Step 5: Solve for x
    x = 15,378,100,660.86/142,089.12
  6. Step 6: Final answer
    x = 108,228.56

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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.