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Finding the Fourth Proportional to 215,864.80, 323,643.60 and 82,693.60

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Solution

The fourth proportional to 215,864.80, 323,643.60 and 82,693.60 is: 123,981.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,864.80 : 323,643.60 = 82,693.60 : x
  2. Step 2: Convert to fraction form
    215,864.80/323,643.60 = 82,693.60/x
  3. Step 3: Cross multiply
    215,864.80x = 323,643.60 × 82,693.60
  4. Step 4: Simplify right side
    215,864.80x = 26,763,254,400.96
  5. Step 5: Solve for x
    x = 26,763,254,400.96/215,864.80
  6. Step 6: Final answer
    x = 123,981.56

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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.