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Finding the Fourth Proportional to 68,696.29, 103,045.85 and 45,153.94

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Solution

The fourth proportional to 68,696.29, 103,045.85 and 45,153.94 is: 67,731.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,696.29 : 103,045.85 = 45,153.94 : x
  2. Step 2: Convert to fraction form
    68,696.29/103,045.85 = 45,153.94/x
  3. Step 3: Cross multiply
    68,696.29x = 103,045.85 × 45,153.94
  4. Step 4: Simplify right side
    68,696.29x = 4,652,926,128.15
  5. Step 5: Solve for x
    x = 4,652,926,128.15/68,696.29
  6. Step 6: Final answer
    x = 67,731.84

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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.