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Finding the Fourth Proportional to 221,959.93, 306,300.09 and 121,357.93

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Solution

The fourth proportional to 221,959.93, 306,300.09 and 121,357.93 is: 167,471.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,959.93 : 306,300.09 = 121,357.93 : x
  2. Step 2: Convert to fraction form
    221,959.93/306,300.09 = 121,357.93/x
  3. Step 3: Cross multiply
    221,959.93x = 306,300.09 × 121,357.93
  4. Step 4: Simplify right side
    221,959.93x = 37,171,944,881.21
  5. Step 5: Solve for x
    x = 37,171,944,881.21/221,959.93
  6. Step 6: Final answer
    x = 167,471.42

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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.