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Finding the Fourth Proportional to 123,468.50, 170,386.54 and 66,879.88

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Solution

The fourth proportional to 123,468.50, 170,386.54 and 66,879.88 is: 92,294.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,468.50 : 170,386.54 = 66,879.88 : x
  2. Step 2: Convert to fraction form
    123,468.50/170,386.54 = 66,879.88/x
  3. Step 3: Cross multiply
    123,468.50x = 170,386.54 × 66,879.88
  4. Step 4: Simplify right side
    123,468.50x = 11,395,430,755.65
  5. Step 5: Solve for x
    x = 11,395,430,755.65/123,468.50
  6. Step 6: Final answer
    x = 92,294.23

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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.