Home / 142,288.96-196,358.68-78,626.20

Finding the Fourth Proportional to 142,288.96, 196,358.68 and 78,626.20

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Solution

The fourth proportional to 142,288.96, 196,358.68 and 78,626.20 is: 108,504.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,288.96 : 196,358.68 = 78,626.20 : x
  2. Step 2: Convert to fraction form
    142,288.96/196,358.68 = 78,626.20/x
  3. Step 3: Cross multiply
    142,288.96x = 196,358.68 × 78,626.20
  4. Step 4: Simplify right side
    142,288.96x = 15,438,936,845.42
  5. Step 5: Solve for x
    x = 15,438,936,845.42/142,288.96
  6. Step 6: Final answer
    x = 108,504.11

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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.