Home / 142,815.06-212,945.78-138,891.54

Finding the Fourth Proportional to 142,815.06, 212,945.78 and 138,891.54

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Solution

The fourth proportional to 142,815.06, 212,945.78 and 138,891.54 is: 207,095.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,815.06 : 212,945.78 = 138,891.54 : x
  2. Step 2: Convert to fraction form
    142,815.06/212,945.78 = 138,891.54/x
  3. Step 3: Cross multiply
    142,815.06x = 212,945.78 × 138,891.54
  4. Step 4: Simplify right side
    142,815.06x = 29,576,367,320.70
  5. Step 5: Solve for x
    x = 29,576,367,320.70/142,815.06
  6. Step 6: Final answer
    x = 207,095.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.