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Finding the Fourth Proportional to 123,854.67, 170,915.87 and 70,144.38

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Solution

The fourth proportional to 123,854.67, 170,915.87 and 70,144.38 is: 96,797.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,854.67 : 170,915.87 = 70,144.38 : x
  2. Step 2: Convert to fraction form
    123,854.67/170,915.87 = 70,144.38/x
  3. Step 3: Cross multiply
    123,854.67x = 170,915.87 × 70,144.38
  4. Step 4: Simplify right side
    123,854.67x = 11,988,787,908.67
  5. Step 5: Solve for x
    x = 11,988,787,908.67/123,854.67
  6. Step 6: Final answer
    x = 96,797.22

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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.