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Finding the Fourth Proportional to 223,308.68, 308,167.12 and 121,334.40

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Solution

The fourth proportional to 223,308.68, 308,167.12 and 121,334.40 is: 167,442.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,308.68 : 308,167.12 = 121,334.40 : x
  2. Step 2: Convert to fraction form
    223,308.68/308,167.12 = 121,334.40/x
  3. Step 3: Cross multiply
    223,308.68x = 308,167.12 × 121,334.40
  4. Step 4: Simplify right side
    223,308.68x = 37,391,272,604.93
  5. Step 5: Solve for x
    x = 37,391,272,604.93/223,308.68
  6. Step 6: Final answer
    x = 167,442.09

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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.