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Finding the Fourth Proportional to 223,450.80, 335,176.20 and 128,972.40

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Solution

The fourth proportional to 223,450.80, 335,176.20 and 128,972.40 is: 193,458.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,450.80 : 335,176.20 = 128,972.40 : x
  2. Step 2: Convert to fraction form
    223,450.80/335,176.20 = 128,972.40/x
  3. Step 3: Cross multiply
    223,450.80x = 335,176.20 × 128,972.40
  4. Step 4: Simplify right side
    223,450.80x = 43,228,478,936.88
  5. Step 5: Solve for x
    x = 43,228,478,936.88/223,450.80
  6. Step 6: Final answer
    x = 193,458.60

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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.