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Finding the Fourth Proportional to 123,391.68, 170,280 and 69,676.08

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Solution

The fourth proportional to 123,391.68, 170,280 and 69,676.08 is: 96,152.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,391.68 : 170,280 = 69,676.08 : x
  2. Step 2: Convert to fraction form
    123,391.68/170,280 = 69,676.08/x
  3. Step 3: Cross multiply
    123,391.68x = 170,280 × 69,676.08
  4. Step 4: Simplify right side
    123,391.68x = 11,864,442,902.40
  5. Step 5: Solve for x
    x = 11,864,442,902.40/123,391.68
  6. Step 6: Final answer
    x = 96,152.70

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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.