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Finding the Fourth Proportional to 121,603.78, 167,814.87 and 67,159.61

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Solution

The fourth proportional to 121,603.78, 167,814.87 and 67,159.61 is: 92,681.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,603.78 : 167,814.87 = 67,159.61 : x
  2. Step 2: Convert to fraction form
    121,603.78/167,814.87 = 67,159.61/x
  3. Step 3: Cross multiply
    121,603.78x = 167,814.87 × 67,159.61
  4. Step 4: Simplify right side
    121,603.78x = 11,270,382,081.52
  5. Step 5: Solve for x
    x = 11,270,382,081.52/121,603.78
  6. Step 6: Final answer
    x = 92,681.18

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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.