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Finding the Fourth Proportional to 158,405.21, 218,597.33 and 85,806.73

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Solution

The fourth proportional to 158,405.21, 218,597.33 and 85,806.73 is: 118,412.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,405.21 : 218,597.33 = 85,806.73 : x
  2. Step 2: Convert to fraction form
    158,405.21/218,597.33 = 85,806.73/x
  3. Step 3: Cross multiply
    158,405.21x = 218,597.33 × 85,806.73
  4. Step 4: Simplify right side
    158,405.21x = 18,757,122,074.03
  5. Step 5: Solve for x
    x = 18,757,122,074.03/158,405.21
  6. Step 6: Final answer
    x = 118,412.28

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1.5x scale

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.