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Finding the Fourth Proportional to 123,468.68, 170,386.62 and 66,880.28

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Solution

The fourth proportional to 123,468.68, 170,386.62 and 66,880.28 is: 92,294.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,468.68 : 170,386.62 = 66,880.28 : x
  2. Step 2: Convert to fraction form
    123,468.68/170,386.62 = 66,880.28/x
  3. Step 3: Cross multiply
    123,468.68x = 170,386.62 × 66,880.28
  4. Step 4: Simplify right side
    123,468.68x = 11,395,504,853.85
  5. Step 5: Solve for x
    x = 11,395,504,853.85/123,468.68
  6. Step 6: Final answer
    x = 92,294.70

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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.