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Finding the Fourth Proportional to 167,661.37, 251,488.41 and 78,865.66

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Solution

The fourth proportional to 167,661.37, 251,488.41 and 78,865.66 is: 118,296.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,661.37 : 251,488.41 = 78,865.66 : x
  2. Step 2: Convert to fraction form
    167,661.37/251,488.41 = 78,865.66/x
  3. Step 3: Cross multiply
    167,661.37x = 251,488.41 × 78,865.66
  4. Step 4: Simplify right side
    167,661.37x = 19,833,799,437.00
  5. Step 5: Solve for x
    x = 19,833,799,437.00/167,661.37
  6. Step 6: Final answer
    x = 118,296.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.