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Finding the Fourth Proportional to 223,832.40, 308,891.84 and 121,860.95

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Solution

The fourth proportional to 223,832.40, 308,891.84 and 121,860.95 is: 168,169.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,832.40 : 308,891.84 = 121,860.95 : x
  2. Step 2: Convert to fraction form
    223,832.40/308,891.84 = 121,860.95/x
  3. Step 3: Cross multiply
    223,832.40x = 308,891.84 × 121,860.95
  4. Step 4: Simplify right side
    223,832.40x = 37,641,851,829.84
  5. Step 5: Solve for x
    x = 37,641,851,829.84/223,832.40
  6. Step 6: Final answer
    x = 168,169.81

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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.