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Finding the Fourth Proportional to 68,706.18, 103,115.79 and 29,307.78

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Solution

The fourth proportional to 68,706.18, 103,115.79 and 29,307.78 is: 43,985.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,706.18 : 103,115.79 = 29,307.78 : x
  2. Step 2: Convert to fraction form
    68,706.18/103,115.79 = 29,307.78/x
  3. Step 3: Cross multiply
    68,706.18x = 103,115.79 × 29,307.78
  4. Step 4: Simplify right side
    68,706.18x = 3,022,094,887.85
  5. Step 5: Solve for x
    x = 3,022,094,887.85/68,706.18
  6. Step 6: Final answer
    x = 43,985.78

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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.