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Finding the Fourth Proportional to 215,016.60, 322,409.70 and 90,216.60

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Solution

The fourth proportional to 215,016.60, 322,409.70 and 90,216.60 is: 135,276.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,016.60 : 322,409.70 = 90,216.60 : x
  2. Step 2: Convert to fraction form
    215,016.60/322,409.70 = 90,216.60/x
  3. Step 3: Cross multiply
    215,016.60x = 322,409.70 × 90,216.60
  4. Step 4: Simplify right side
    215,016.60x = 29,086,706,941.02
  5. Step 5: Solve for x
    x = 29,086,706,941.02/215,016.60
  6. Step 6: Final answer
    x = 135,276.56

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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.