Home / 143,396.70-215,123.79-80,306.58

Finding the Fourth Proportional to 143,396.70, 215,123.79 and 80,306.58

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Solution

The fourth proportional to 143,396.70, 215,123.79 and 80,306.58 is: 120,475.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,396.70 : 215,123.79 = 80,306.58 : x
  2. Step 2: Convert to fraction form
    143,396.70/215,123.79 = 80,306.58/x
  3. Step 3: Cross multiply
    143,396.70x = 215,123.79 × 80,306.58
  4. Step 4: Simplify right side
    143,396.70x = 17,275,855,851.54
  5. Step 5: Solve for x
    x = 17,275,855,851.54/143,396.70
  6. Step 6: Final answer
    x = 120,475.97

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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.