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Finding the Fourth Proportional to 45,878.60, 68,729.11 and 26,857.17

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Solution

The fourth proportional to 45,878.60, 68,729.11 and 26,857.17 is: 40,233.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,878.60 : 68,729.11 = 26,857.17 : x
  2. Step 2: Convert to fraction form
    45,878.60/68,729.11 = 26,857.17/x
  3. Step 3: Cross multiply
    45,878.60x = 68,729.11 × 26,857.17
  4. Step 4: Simplify right side
    45,878.60x = 1,845,869,324.08
  5. Step 5: Solve for x
    x = 1,845,869,324.08/45,878.60
  6. Step 6: Final answer
    x = 40,233.77

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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.