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Finding the Fourth Proportional to 236,642, 326,564.30 and 129,211.96

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Solution

The fourth proportional to 236,642, 326,564.30 and 129,211.96 is: 178,311.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,642 : 326,564.30 = 129,211.96 : x
  2. Step 2: Convert to fraction form
    236,642/326,564.30 = 129,211.96/x
  3. Step 3: Cross multiply
    236,642x = 326,564.30 × 129,211.96
  4. Step 4: Simplify right side
    236,642x = 42,196,013,269.03
  5. Step 5: Solve for x
    x = 42,196,013,269.03/236,642
  6. Step 6: Final answer
    x = 178,311.60

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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.