Home / 103,612.26-155,418.39-68,543.72

Finding the Fourth Proportional to 103,612.26, 155,418.39 and 68,543.72

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Solution

The fourth proportional to 103,612.26, 155,418.39 and 68,543.72 is: 102,815.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,612.26 : 155,418.39 = 68,543.72 : x
  2. Step 2: Convert to fraction form
    103,612.26/155,418.39 = 68,543.72/x
  3. Step 3: Cross multiply
    103,612.26x = 155,418.39 × 68,543.72
  4. Step 4: Simplify right side
    103,612.26x = 10,652,953,829.92
  5. Step 5: Solve for x
    x = 10,652,953,829.92/103,612.26
  6. Step 6: Final answer
    x = 102,815.57

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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.