Home / 130,982.40-196,358.40-78,412.80

Finding the Fourth Proportional to 130,982.40, 196,358.40 and 78,412.80

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Solution

The fourth proportional to 130,982.40, 196,358.40 and 78,412.80 is: 117,550.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,982.40 : 196,358.40 = 78,412.80 : x
  2. Step 2: Convert to fraction form
    130,982.40/196,358.40 = 78,412.80/x
  3. Step 3: Cross multiply
    130,982.40x = 196,358.40 × 78,412.80
  4. Step 4: Simplify right side
    130,982.40x = 15,397,011,947.52
  5. Step 5: Solve for x
    x = 15,397,011,947.52/130,982.40
  6. Step 6: Final answer
    x = 117,550.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.