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Finding the Fourth Proportional to 123,396.69, 170,286.12 and 69,678.57

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Solution

The fourth proportional to 123,396.69, 170,286.12 and 69,678.57 is: 96,155.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,396.69 : 170,286.12 = 69,678.57 : x
  2. Step 2: Convert to fraction form
    123,396.69/170,286.12 = 69,678.57/x
  3. Step 3: Cross multiply
    123,396.69x = 170,286.12 × 69,678.57
  4. Step 4: Simplify right side
    123,396.69x = 11,865,293,332.45
  5. Step 5: Solve for x
    x = 11,865,293,332.45/123,396.69
  6. Step 6: Final answer
    x = 96,155.69

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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.