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Finding the Fourth Proportional to 218,782.80, 328,174.20 and 125,211.60

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Solution

The fourth proportional to 218,782.80, 328,174.20 and 125,211.60 is: 187,817.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,782.80 : 328,174.20 = 125,211.60 : x
  2. Step 2: Convert to fraction form
    218,782.80/328,174.20 = 125,211.60/x
  3. Step 3: Cross multiply
    218,782.80x = 328,174.20 × 125,211.60
  4. Step 4: Simplify right side
    218,782.80x = 41,091,216,660.72
  5. Step 5: Solve for x
    x = 41,091,216,660.72/218,782.80
  6. Step 6: Final answer
    x = 187,817.40

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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.