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Finding the Fourth Proportional to 118,992, 164,211.12 and 65,279.76

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Solution

The fourth proportional to 118,992, 164,211.12 and 65,279.76 is: 90,087.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,992 : 164,211.12 = 65,279.76 : x
  2. Step 2: Convert to fraction form
    118,992/164,211.12 = 65,279.76/x
  3. Step 3: Cross multiply
    118,992x = 164,211.12 × 65,279.76
  4. Step 4: Simplify right side
    118,992x = 10,719,662,502.93
  5. Step 5: Solve for x
    x = 10,719,662,502.93/118,992
  6. Step 6: Final answer
    x = 90,087.25

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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.