Home / 129,342.40-193,780.11-54,328.30

Finding the Fourth Proportional to 129,342.40, 193,780.11 and 54,328.30

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Solution

The fourth proportional to 129,342.40, 193,780.11 and 54,328.30 is: 81,394.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,342.40 : 193,780.11 = 54,328.30 : x
  2. Step 2: Convert to fraction form
    129,342.40/193,780.11 = 54,328.30/x
  3. Step 3: Cross multiply
    129,342.40x = 193,780.11 × 54,328.30
  4. Step 4: Simplify right side
    129,342.40x = 10,527,743,950.11
  5. Step 5: Solve for x
    x = 10,527,743,950.11/129,342.40
  6. Step 6: Final answer
    x = 81,394.38

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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.