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Finding the Fourth Proportional to 158,645.78, 218,930.56 and 98,204.38

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Solution

The fourth proportional to 158,645.78, 218,930.56 and 98,204.38 is: 135,521.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,645.78 : 218,930.56 = 98,204.38 : x
  2. Step 2: Convert to fraction form
    158,645.78/218,930.56 = 98,204.38/x
  3. Step 3: Cross multiply
    158,645.78x = 218,930.56 × 98,204.38
  4. Step 4: Simplify right side
    158,645.78x = 21,499,939,907.85
  5. Step 5: Solve for x
    x = 21,499,939,907.85/158,645.78
  6. Step 6: Final answer
    x = 135,521.66

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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.