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Finding the Fourth Proportional to 107,438.80, 161,158.20 and 68,040.40

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Solution

The fourth proportional to 107,438.80, 161,158.20 and 68,040.40 is: 102,060.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,438.80 : 161,158.20 = 68,040.40 : x
  2. Step 2: Convert to fraction form
    107,438.80/161,158.20 = 68,040.40/x
  3. Step 3: Cross multiply
    107,438.80x = 161,158.20 × 68,040.40
  4. Step 4: Simplify right side
    107,438.80x = 10,965,268,391.28
  5. Step 5: Solve for x
    x = 10,965,268,391.28/107,438.80
  6. Step 6: Final answer
    x = 102,060.60

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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.