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Finding the Fourth Proportional to 68,146.72, 102,236.48 and 28,715.11

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Solution

The fourth proportional to 68,146.72, 102,236.48 and 28,715.11 is: 43,079.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,146.72 : 102,236.48 = 28,715.11 : x
  2. Step 2: Convert to fraction form
    68,146.72/102,236.48 = 28,715.11/x
  3. Step 3: Cross multiply
    68,146.72x = 102,236.48 × 28,715.11
  4. Step 4: Simplify right side
    68,146.72x = 2,935,731,477.73
  5. Step 5: Solve for x
    x = 2,935,731,477.73/68,146.72
  6. Step 6: Final answer
    x = 43,079.57

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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.