Home / 130,400.20-195,308.70-100,721.80

Finding the Fourth Proportional to 130,400.20, 195,308.70 and 100,721.80

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Solution

The fourth proportional to 130,400.20, 195,308.70 and 100,721.80 is: 150,857.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,400.20 : 195,308.70 = 100,721.80 : x
  2. Step 2: Convert to fraction form
    130,400.20/195,308.70 = 100,721.80/x
  3. Step 3: Cross multiply
    130,400.20x = 195,308.70 × 100,721.80
  4. Step 4: Simplify right side
    130,400.20x = 19,671,843,819.66
  5. Step 5: Solve for x
    x = 19,671,843,819.66/130,400.20
  6. Step 6: Final answer
    x = 150,857.47

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1.5x scale

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.