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Finding the Fourth Proportional to 223,899.80, 335,849.70 and 129,421.40

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Solution

The fourth proportional to 223,899.80, 335,849.70 and 129,421.40 is: 194,132.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,899.80 : 335,849.70 = 129,421.40 : x
  2. Step 2: Convert to fraction form
    223,899.80/335,849.70 = 129,421.40/x
  3. Step 3: Cross multiply
    223,899.80x = 335,849.70 × 129,421.40
  4. Step 4: Simplify right side
    223,899.80x = 43,466,138,363.58
  5. Step 5: Solve for x
    x = 43,466,138,363.58/223,899.80
  6. Step 6: Final answer
    x = 194,132.10

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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.