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Finding the Fourth Proportional to 238,658.78, 357,976.82 and 70,172.30

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Solution

The fourth proportional to 238,658.78, 357,976.82 and 70,172.30 is: 105,255.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,658.78 : 357,976.82 = 70,172.30 : x
  2. Step 2: Convert to fraction form
    238,658.78/357,976.82 = 70,172.30/x
  3. Step 3: Cross multiply
    238,658.78x = 357,976.82 × 70,172.30
  4. Step 4: Simplify right side
    238,658.78x = 25,120,056,806.09
  5. Step 5: Solve for x
    x = 25,120,056,806.09/238,658.78
  6. Step 6: Final answer
    x = 105,255.11

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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.