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Finding the Fourth Proportional to 215,643.46, 323,514.40 and 65,905.04

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Solution

The fourth proportional to 215,643.46, 323,514.40 and 65,905.04 is: 98,872.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,643.46 : 323,514.40 = 65,905.04 : x
  2. Step 2: Convert to fraction form
    215,643.46/323,514.40 = 65,905.04/x
  3. Step 3: Cross multiply
    215,643.46x = 323,514.40 × 65,905.04
  4. Step 4: Simplify right side
    215,643.46x = 21,321,228,499.03
  5. Step 5: Solve for x
    x = 21,321,228,499.03/215,643.46
  6. Step 6: Final answer
    x = 98,872.60

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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.