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Finding the Fourth Proportional to 218,911.80, 328,367.70 and 125,340.60

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Solution

The fourth proportional to 218,911.80, 328,367.70 and 125,340.60 is: 188,010.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,911.80 : 328,367.70 = 125,340.60 : x
  2. Step 2: Convert to fraction form
    218,911.80/328,367.70 = 125,340.60/x
  3. Step 3: Cross multiply
    218,911.80x = 328,367.70 × 125,340.60
  4. Step 4: Simplify right side
    218,911.80x = 41,157,804,538.62
  5. Step 5: Solve for x
    x = 41,157,804,538.62/218,911.80
  6. Step 6: Final answer
    x = 188,010.90

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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.