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Finding the Fourth Proportional to 229,641, 316,934.28 and 129,039

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Solution

The fourth proportional to 229,641, 316,934.28 and 129,039 is: 178,090.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,641 : 316,934.28 = 129,039 : x
  2. Step 2: Convert to fraction form
    229,641/316,934.28 = 129,039/x
  3. Step 3: Cross multiply
    229,641x = 316,934.28 × 129,039
  4. Step 4: Simplify right side
    229,641x = 40,896,882,556.92
  5. Step 5: Solve for x
    x = 40,896,882,556.92/229,641
  6. Step 6: Final answer
    x = 178,090.51

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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.