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Finding the Fourth Proportional to 123,775.75, 170,810.13 and 67,186.72

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Solution

The fourth proportional to 123,775.75, 170,810.13 and 67,186.72 is: 92,717.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,775.75 : 170,810.13 = 67,186.72 : x
  2. Step 2: Convert to fraction form
    123,775.75/170,810.13 = 67,186.72/x
  3. Step 3: Cross multiply
    123,775.75x = 170,810.13 × 67,186.72
  4. Step 4: Simplify right side
    123,775.75x = 11,476,172,377.47
  5. Step 5: Solve for x
    x = 11,476,172,377.47/123,775.75
  6. Step 6: Final answer
    x = 92,717.45

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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.