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Finding the Fourth Proportional to 215,999.20, 323,957.04 and 66,203.20

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Solution

The fourth proportional to 215,999.20, 323,957.04 and 66,203.20 is: 99,292.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,999.20 : 323,957.04 = 66,203.20 : x
  2. Step 2: Convert to fraction form
    215,999.20/323,957.04 = 66,203.20/x
  3. Step 3: Cross multiply
    215,999.20x = 323,957.04 × 66,203.20
  4. Step 4: Simplify right side
    215,999.20x = 21,446,992,710.53
  5. Step 5: Solve for x
    x = 21,446,992,710.53/215,999.20
  6. Step 6: Final answer
    x = 99,292.00

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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.