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Finding the Fourth Proportional to 215,753.05, 323,688.35 and 65,990.03

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Solution

The fourth proportional to 215,753.05, 323,688.35 and 65,990.03 is: 99,003.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,753.05 : 323,688.35 = 65,990.03 : x
  2. Step 2: Convert to fraction form
    215,753.05/323,688.35 = 65,990.03/x
  3. Step 3: Cross multiply
    215,753.05x = 323,688.35 × 65,990.03
  4. Step 4: Simplify right side
    215,753.05x = 21,360,202,473.68
  5. Step 5: Solve for x
    x = 21,360,202,473.68/215,753.05
  6. Step 6: Final answer
    x = 99,003.01

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1.5x scale

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.