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Finding the Fourth Proportional to 223,394.88, 308,287.44 and 121,421.28

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Solution

The fourth proportional to 223,394.88, 308,287.44 and 121,421.28 is: 167,562.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,394.88 : 308,287.44 = 121,421.28 : x
  2. Step 2: Convert to fraction form
    223,394.88/308,287.44 = 121,421.28/x
  3. Step 3: Cross multiply
    223,394.88x = 308,287.44 × 121,421.28
  4. Step 4: Simplify right side
    223,394.88x = 37,432,655,572.72
  5. Step 5: Solve for x
    x = 37,432,655,572.72/223,394.88
  6. Step 6: Final answer
    x = 167,562.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.