Home / 68,781.52-103,172.32-45,402.50

Finding the Fourth Proportional to 68,781.52, 103,172.32 and 45,402.50

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Solution

The fourth proportional to 68,781.52, 103,172.32 and 45,402.50 is: 68,103.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,781.52 : 103,172.32 = 45,402.50 : x
  2. Step 2: Convert to fraction form
    68,781.52/103,172.32 = 45,402.50/x
  3. Step 3: Cross multiply
    68,781.52x = 103,172.32 × 45,402.50
  4. Step 4: Simplify right side
    68,781.52x = 4,684,281,258.80
  5. Step 5: Solve for x
    x = 4,684,281,258.80/68,781.52
  6. Step 6: Final answer
    x = 68,103.78

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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.