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Finding the Fourth Proportional to 68,555.10, 102,715.03 and 61,621.71

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Solution

The fourth proportional to 68,555.10, 102,715.03 and 61,621.71 is: 92,326.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,555.10 : 102,715.03 = 61,621.71 : x
  2. Step 2: Convert to fraction form
    68,555.10/102,715.03 = 61,621.71/x
  3. Step 3: Cross multiply
    68,555.10x = 102,715.03 × 61,621.71
  4. Step 4: Simplify right side
    68,555.10x = 6,329,475,791.30
  5. Step 5: Solve for x
    x = 6,329,475,791.30/68,555.10
  6. Step 6: Final answer
    x = 92,326.84

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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.