Home / 107,638.80-161,270.28-70,139.04

Finding the Fourth Proportional to 107,638.80, 161,270.28 and 70,139.04

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Solution

The fourth proportional to 107,638.80, 161,270.28 and 70,139.04 is: 105,086.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,638.80 : 161,270.28 = 70,139.04 : x
  2. Step 2: Convert to fraction form
    107,638.80/161,270.28 = 70,139.04/x
  3. Step 3: Cross multiply
    107,638.80x = 161,270.28 × 70,139.04
  4. Step 4: Simplify right side
    107,638.80x = 11,311,342,619.73
  5. Step 5: Solve for x
    x = 11,311,342,619.73/107,638.80
  6. Step 6: Final answer
    x = 105,086.11

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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.