Home / 78,091.47-117,136.15-18,927.65

Finding the Fourth Proportional to 78,091.47, 117,136.15 and 18,927.65

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Solution

The fourth proportional to 78,091.47, 117,136.15 and 18,927.65 is: 28,391.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,091.47 : 117,136.15 = 18,927.65 : x
  2. Step 2: Convert to fraction form
    78,091.47/117,136.15 = 18,927.65/x
  3. Step 3: Cross multiply
    78,091.47x = 117,136.15 × 18,927.65
  4. Step 4: Simplify right side
    78,091.47x = 2,217,112,049.55
  5. Step 5: Solve for x
    x = 2,217,112,049.55/78,091.47
  6. Step 6: Final answer
    x = 28,391.22

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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.