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Finding the Fourth Proportional to 178,718.05, 267,668.79 and 85,289.41

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Solution

The fourth proportional to 178,718.05, 267,668.79 and 85,289.41 is: 127,739.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,718.05 : 267,668.79 = 85,289.41 : x
  2. Step 2: Convert to fraction form
    178,718.05/267,668.79 = 85,289.41/x
  3. Step 3: Cross multiply
    178,718.05x = 267,668.79 × 85,289.41
  4. Step 4: Simplify right side
    178,718.05x = 22,829,313,174.51
  5. Step 5: Solve for x
    x = 22,829,313,174.51/178,718.05
  6. Step 6: Final answer
    x = 127,739.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.