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Finding the Fourth Proportional to 223,405.80, 335,108.70 and 128,927.40

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Solution

The fourth proportional to 223,405.80, 335,108.70 and 128,927.40 is: 193,391.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,405.80 : 335,108.70 = 128,927.40 : x
  2. Step 2: Convert to fraction form
    223,405.80/335,108.70 = 128,927.40/x
  3. Step 3: Cross multiply
    223,405.80x = 335,108.70 × 128,927.40
  4. Step 4: Simplify right side
    223,405.80x = 43,204,693,408.38
  5. Step 5: Solve for x
    x = 43,204,693,408.38/223,405.80
  6. Step 6: Final answer
    x = 193,391.10

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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.