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Finding the Fourth Proportional to 218,881.80, 328,322.70 and 125,310.60

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Solution

The fourth proportional to 218,881.80, 328,322.70 and 125,310.60 is: 187,965.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,881.80 : 328,322.70 = 125,310.60 : x
  2. Step 2: Convert to fraction form
    218,881.80/328,322.70 = 125,310.60/x
  3. Step 3: Cross multiply
    218,881.80x = 328,322.70 × 125,310.60
  4. Step 4: Simplify right side
    218,881.80x = 41,142,314,530.62
  5. Step 5: Solve for x
    x = 41,142,314,530.62/218,881.80
  6. Step 6: Final answer
    x = 187,965.90

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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.