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Finding the Fourth Proportional to 229,157.25, 316,239.17 and 128,557.41

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Solution

The fourth proportional to 229,157.25, 316,239.17 and 128,557.41 is: 177,410.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,157.25 : 316,239.17 = 128,557.41 : x
  2. Step 2: Convert to fraction form
    229,157.25/316,239.17 = 128,557.41/x
  3. Step 3: Cross multiply
    229,157.25x = 316,239.17 × 128,557.41
  4. Step 4: Simplify right side
    229,157.25x = 40,654,888,635.75
  5. Step 5: Solve for x
    x = 40,654,888,635.75/229,157.25
  6. Step 6: Final answer
    x = 177,410.44

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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.