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Finding the Fourth Proportional to 216,702.82, 324,840.96 and 126,631.22

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Solution

The fourth proportional to 216,702.82, 324,840.96 and 126,631.22 is: 189,822.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,702.82 : 324,840.96 = 126,631.22 : x
  2. Step 2: Convert to fraction form
    216,702.82/324,840.96 = 126,631.22/x
  3. Step 3: Cross multiply
    216,702.82x = 324,840.96 × 126,631.22
  4. Step 4: Simplify right side
    216,702.82x = 41,135,007,070.77
  5. Step 5: Solve for x
    x = 41,135,007,070.77/216,702.82
  6. Step 6: Final answer
    x = 189,822.20

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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.