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Finding the Fourth Proportional to 218,912.80, 328,369.20 and 125,341.60

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Solution

The fourth proportional to 218,912.80, 328,369.20 and 125,341.60 is: 188,012.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,912.80 : 328,369.20 = 125,341.60 : x
  2. Step 2: Convert to fraction form
    218,912.80/328,369.20 = 125,341.60/x
  3. Step 3: Cross multiply
    218,912.80x = 328,369.20 × 125,341.60
  4. Step 4: Simplify right side
    218,912.80x = 41,158,320,918.72
  5. Step 5: Solve for x
    x = 41,158,320,918.72/218,912.80
  6. Step 6: Final answer
    x = 188,012.40

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1.5x scale

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.