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Finding the Fourth Proportional to 203,291.90, 304,878.56 and 68,340.72

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Solution

The fourth proportional to 203,291.90, 304,878.56 and 68,340.72 is: 102,491.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,291.90 : 304,878.56 = 68,340.72 : x
  2. Step 2: Convert to fraction form
    203,291.90/304,878.56 = 68,340.72/x
  3. Step 3: Cross multiply
    203,291.90x = 304,878.56 × 68,340.72
  4. Step 4: Simplify right side
    203,291.90x = 20,835,620,302.96
  5. Step 5: Solve for x
    x = 20,835,620,302.96/203,291.90
  6. Step 6: Final answer
    x = 102,491.15

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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.