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Finding the Fourth Proportional to 107,512.80, 161,123.40 and 71,872.80

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Solution

The fourth proportional to 107,512.80, 161,123.40 and 71,872.80 is: 107,711.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,512.80 : 161,123.40 = 71,872.80 : x
  2. Step 2: Convert to fraction form
    107,512.80/161,123.40 = 71,872.80/x
  3. Step 3: Cross multiply
    107,512.80x = 161,123.40 × 71,872.80
  4. Step 4: Simplify right side
    107,512.80x = 11,580,389,903.52
  5. Step 5: Solve for x
    x = 11,580,389,903.52/107,512.80
  6. Step 6: Final answer
    x = 107,711.73

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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.