Home / 223,965.52-309,072.84-121,990.66

Finding the Fourth Proportional to 223,965.52, 309,072.84 and 121,990.66

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Solution

The fourth proportional to 223,965.52, 309,072.84 and 121,990.66 is: 168,347.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,965.52 : 309,072.84 = 121,990.66 : x
  2. Step 2: Convert to fraction form
    223,965.52/309,072.84 = 121,990.66/x
  3. Step 3: Cross multiply
    223,965.52x = 309,072.84 × 121,990.66
  4. Step 4: Simplify right side
    223,965.52x = 37,703,999,739.67
  5. Step 5: Solve for x
    x = 37,703,999,739.67/223,965.52
  6. Step 6: Final answer
    x = 168,347.34

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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.