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Finding the Fourth Proportional to 123,850.29, 170,915.40 and 70,133.88

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Solution

The fourth proportional to 123,850.29, 170,915.40 and 70,133.88 is: 96,785.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,850.29 : 170,915.40 = 70,133.88 : x
  2. Step 2: Convert to fraction form
    123,850.29/170,915.40 = 70,133.88/x
  3. Step 3: Cross multiply
    123,850.29x = 170,915.40 × 70,133.88
  4. Step 4: Simplify right side
    123,850.29x = 11,986,960,153.75
  5. Step 5: Solve for x
    x = 11,986,960,153.75/123,850.29
  6. Step 6: Final answer
    x = 96,785.89

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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.