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Finding the Fourth Proportional to 217,607.79, 300,285.28 and 120,806.01

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Solution

The fourth proportional to 217,607.79, 300,285.28 and 120,806.01 is: 166,704.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,607.79 : 300,285.28 = 120,806.01 : x
  2. Step 2: Convert to fraction form
    217,607.79/300,285.28 = 120,806.01/x
  3. Step 3: Cross multiply
    217,607.79x = 300,285.28 × 120,806.01
  4. Step 4: Simplify right side
    217,607.79x = 36,276,265,165.45
  5. Step 5: Solve for x
    x = 36,276,265,165.45/217,607.79
  6. Step 6: Final answer
    x = 166,704.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.