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Finding the Fourth Proportional to 130,671.20, 195,715.20 and 100,855.10

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Solution

The fourth proportional to 130,671.20, 195,715.20 and 100,855.10 is: 151,057.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,671.20 : 195,715.20 = 100,855.10 : x
  2. Step 2: Convert to fraction form
    130,671.20/195,715.20 = 100,855.10/x
  3. Step 3: Cross multiply
    130,671.20x = 195,715.20 × 100,855.10
  4. Step 4: Simplify right side
    130,671.20x = 19,738,876,067.52
  5. Step 5: Solve for x
    x = 19,738,876,067.52/130,671.20
  6. Step 6: Final answer
    x = 151,057.59

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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.