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Finding the Fourth Proportional to 272,358.88, 408,603.94 and 85,370.38

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Solution

The fourth proportional to 272,358.88, 408,603.94 and 85,370.38 is: 128,076.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,358.88 : 408,603.94 = 85,370.38 : x
  2. Step 2: Convert to fraction form
    272,358.88/408,603.94 = 85,370.38/x
  3. Step 3: Cross multiply
    272,358.88x = 408,603.94 × 85,370.38
  4. Step 4: Simplify right side
    272,358.88x = 34,882,673,627.30
  5. Step 5: Solve for x
    x = 34,882,673,627.30/272,358.88
  6. Step 6: Final answer
    x = 128,076.14

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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.