Home / 68,780.47-103,185.55-21,394.66

Finding the Fourth Proportional to 68,780.47, 103,185.55 and 21,394.66

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Solution

The fourth proportional to 68,780.47, 103,185.55 and 21,394.66 is: 32,096.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,780.47 : 103,185.55 = 21,394.66 : x
  2. Step 2: Convert to fraction form
    68,780.47/103,185.55 = 21,394.66/x
  3. Step 3: Cross multiply
    68,780.47x = 103,185.55 × 21,394.66
  4. Step 4: Simplify right side
    68,780.47x = 2,207,619,136.26
  5. Step 5: Solve for x
    x = 2,207,619,136.26/68,780.47
  6. Step 6: Final answer
    x = 32,096.60

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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.