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Finding the Fourth Proportional to 229,493.25, 316,730.39 and 128,891.25

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Solution

The fourth proportional to 229,493.25, 316,730.39 and 128,891.25 is: 177,886.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,493.25 : 316,730.39 = 128,891.25 : x
  2. Step 2: Convert to fraction form
    229,493.25/316,730.39 = 128,891.25/x
  3. Step 3: Cross multiply
    229,493.25x = 316,730.39 × 128,891.25
  4. Step 4: Simplify right side
    229,493.25x = 40,823,775,235.63
  5. Step 5: Solve for x
    x = 40,823,775,235.63/229,493.25
  6. Step 6: Final answer
    x = 177,886.61

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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.