Home / 142,725.20-213,678.20-138,629.20

Finding the Fourth Proportional to 142,725.20, 213,678.20 and 138,629.20

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Solution

The fourth proportional to 142,725.20, 213,678.20 and 138,629.20 is: 207,545.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,725.20 : 213,678.20 = 138,629.20 : x
  2. Step 2: Convert to fraction form
    142,725.20/213,678.20 = 138,629.20/x
  3. Step 3: Cross multiply
    142,725.20x = 213,678.20 × 138,629.20
  4. Step 4: Simplify right side
    142,725.20x = 29,622,037,923.44
  5. Step 5: Solve for x
    x = 29,622,037,923.44/142,725.20
  6. Step 6: Final answer
    x = 207,545.95

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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.