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Finding the Fourth Proportional to 68,913.18, 103,838.67 and 56,706.96

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Solution

The fourth proportional to 68,913.18, 103,838.67 and 56,706.96 is: 85,446.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,913.18 : 103,838.67 = 56,706.96 : x
  2. Step 2: Convert to fraction form
    68,913.18/103,838.67 = 56,706.96/x
  3. Step 3: Cross multiply
    68,913.18x = 103,838.67 × 56,706.96
  4. Step 4: Simplify right side
    68,913.18x = 5,888,375,306.14
  5. Step 5: Solve for x
    x = 5,888,375,306.14/68,913.18
  6. Step 6: Final answer
    x = 85,446.29

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.