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Finding the Fourth Proportional to 158,342.85, 218,458.89 and 90,310.68

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Solution

The fourth proportional to 158,342.85, 218,458.89 and 90,310.68 is: 124,597.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,342.85 : 218,458.89 = 90,310.68 : x
  2. Step 2: Convert to fraction form
    158,342.85/218,458.89 = 90,310.68/x
  3. Step 3: Cross multiply
    158,342.85x = 218,458.89 × 90,310.68
  4. Step 4: Simplify right side
    158,342.85x = 19,729,170,907.95
  5. Step 5: Solve for x
    x = 19,729,170,907.95/158,342.85
  6. Step 6: Final answer
    x = 124,597.80

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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.