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Finding the Fourth Proportional to 122,174.15, 168,703.01 and 91,907.01

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Solution

The fourth proportional to 122,174.15, 168,703.01 and 91,907.01 is: 126,908.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,174.15 : 168,703.01 = 91,907.01 : x
  2. Step 2: Convert to fraction form
    122,174.15/168,703.01 = 91,907.01/x
  3. Step 3: Cross multiply
    122,174.15x = 168,703.01 × 91,907.01
  4. Step 4: Simplify right side
    122,174.15x = 15,504,988,767.57
  5. Step 5: Solve for x
    x = 15,504,988,767.57/122,174.15
  6. Step 6: Final answer
    x = 126,908.92

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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.