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Finding the Fourth Proportional to 123,679.75, 170,678.10 and 69,963.62

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Solution

The fourth proportional to 123,679.75, 170,678.10 and 69,963.62 is: 96,549.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,679.75 : 170,678.10 = 69,963.62 : x
  2. Step 2: Convert to fraction form
    123,679.75/170,678.10 = 69,963.62/x
  3. Step 3: Cross multiply
    123,679.75x = 170,678.10 × 69,963.62
  4. Step 4: Simplify right side
    123,679.75x = 11,941,257,730.72
  5. Step 5: Solve for x
    x = 11,941,257,730.72/123,679.75
  6. Step 6: Final answer
    x = 96,549.82

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1.5x scale

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.