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Finding the Fourth Proportional to 123,211.42, 170,019.12 and 90,963.16

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Solution

The fourth proportional to 123,211.42, 170,019.12 and 90,963.16 is: 125,519.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,211.42 : 170,019.12 = 90,963.16 : x
  2. Step 2: Convert to fraction form
    123,211.42/170,019.12 = 90,963.16/x
  3. Step 3: Cross multiply
    123,211.42x = 170,019.12 × 90,963.16
  4. Step 4: Simplify right side
    123,211.42x = 15,465,476,415.62
  5. Step 5: Solve for x
    x = 15,465,476,415.62/123,211.42
  6. Step 6: Final answer
    x = 125,519.83

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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.