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Finding the Fourth Proportional to 123,643.80, 170,626.40 and 69,926.80

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Solution

The fourth proportional to 123,643.80, 170,626.40 and 69,926.80 is: 96,497.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,643.80 : 170,626.40 = 69,926.80 : x
  2. Step 2: Convert to fraction form
    123,643.80/170,626.40 = 69,926.80/x
  3. Step 3: Cross multiply
    123,643.80x = 170,626.40 × 69,926.80
  4. Step 4: Simplify right side
    123,643.80x = 11,931,358,147.52
  5. Step 5: Solve for x
    x = 11,931,358,147.52/123,643.80
  6. Step 6: Final answer
    x = 96,497.83

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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.