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Finding the Fourth Proportional to 223,308.61, 308,162.14 and 121,335.64

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Solution

The fourth proportional to 223,308.61, 308,162.14 and 121,335.64 is: 167,441.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,308.61 : 308,162.14 = 121,335.64 : x
  2. Step 2: Convert to fraction form
    223,308.61/308,162.14 = 121,335.64/x
  3. Step 3: Cross multiply
    223,308.61x = 308,162.14 × 121,335.64
  4. Step 4: Simplify right side
    223,308.61x = 37,391,049,406.93
  5. Step 5: Solve for x
    x = 37,391,049,406.93/223,308.61
  6. Step 6: Final answer
    x = 167,441.15

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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.