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Finding the Fourth Proportional to 117,958.82, 176,763.22 and 86,640.98

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Solution

The fourth proportional to 117,958.82, 176,763.22 and 86,640.98 is: 129,832.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,958.82 : 176,763.22 = 86,640.98 : x
  2. Step 2: Convert to fraction form
    117,958.82/176,763.22 = 86,640.98/x
  3. Step 3: Cross multiply
    117,958.82x = 176,763.22 × 86,640.98
  4. Step 4: Simplify right side
    117,958.82x = 15,314,938,608.76
  5. Step 5: Solve for x
    x = 15,314,938,608.76/117,958.82
  6. Step 6: Final answer
    x = 129,832.92

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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.