Home / 142,011.39-195,976.35-78,351.06

Finding the Fourth Proportional to 142,011.39, 195,976.35 and 78,351.06

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Solution

The fourth proportional to 142,011.39, 195,976.35 and 78,351.06 is: 108,124.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,011.39 : 195,976.35 = 78,351.06 : x
  2. Step 2: Convert to fraction form
    142,011.39/195,976.35 = 78,351.06/x
  3. Step 3: Cross multiply
    142,011.39x = 195,976.35 × 78,351.06
  4. Step 4: Simplify right side
    142,011.39x = 15,354,954,757.43
  5. Step 5: Solve for x
    x = 15,354,954,757.43/142,011.39
  6. Step 6: Final answer
    x = 108,124.81

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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.