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Finding the Fourth Proportional to 215,379.16, 323,116.92 and 65,631.17

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Solution

The fourth proportional to 215,379.16, 323,116.92 and 65,631.17 is: 98,461.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,379.16 : 323,116.92 = 65,631.17 : x
  2. Step 2: Convert to fraction form
    215,379.16/323,116.92 = 65,631.17/x
  3. Step 3: Cross multiply
    215,379.16x = 323,116.92 × 65,631.17
  4. Step 4: Simplify right side
    215,379.16x = 21,206,539,890.81
  5. Step 5: Solve for x
    x = 21,206,539,890.81/215,379.16
  6. Step 6: Final answer
    x = 98,461.43

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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.