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Finding the Fourth Proportional to 229,709.25, 316,998.78 and 129,107.25

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Solution

The fourth proportional to 229,709.25, 316,998.78 and 129,107.25 is: 178,168.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,709.25 : 316,998.78 = 129,107.25 : x
  2. Step 2: Convert to fraction form
    229,709.25/316,998.78 = 129,107.25/x
  3. Step 3: Cross multiply
    229,709.25x = 316,998.78 × 129,107.25
  4. Step 4: Simplify right side
    229,709.25x = 40,926,840,739.16
  5. Step 5: Solve for x
    x = 40,926,840,739.16/229,709.25
  6. Step 6: Final answer
    x = 178,168.01

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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.