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Finding the Fourth Proportional to 123,699.65, 170,721.60 and 69,272.54

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Solution

The fourth proportional to 123,699.65, 170,721.60 and 69,272.54 is: 95,605.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,699.65 : 170,721.60 = 69,272.54 : x
  2. Step 2: Convert to fraction form
    123,699.65/170,721.60 = 69,272.54/x
  3. Step 3: Cross multiply
    123,699.65x = 170,721.60 × 69,272.54
  4. Step 4: Simplify right side
    123,699.65x = 11,826,318,011.26
  5. Step 5: Solve for x
    x = 11,826,318,011.26/123,699.65
  6. Step 6: Final answer
    x = 95,605.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.