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Finding the Fourth Proportional to 218,776.80, 328,165.20 and 125,205.60

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Solution

The fourth proportional to 218,776.80, 328,165.20 and 125,205.60 is: 187,808.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,776.80 : 328,165.20 = 125,205.60 : x
  2. Step 2: Convert to fraction form
    218,776.80/328,165.20 = 125,205.60/x
  3. Step 3: Cross multiply
    218,776.80x = 328,165.20 × 125,205.60
  4. Step 4: Simplify right side
    218,776.80x = 41,088,120,765.12
  5. Step 5: Solve for x
    x = 41,088,120,765.12/218,776.80
  6. Step 6: Final answer
    x = 187,808.40

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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.