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Finding the Fourth Proportional to 217,345.55, 325,990.60 and 84,134.66

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Solution

The fourth proportional to 217,345.55, 325,990.60 and 84,134.66 is: 126,191.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,345.55 : 325,990.60 = 84,134.66 : x
  2. Step 2: Convert to fraction form
    217,345.55/325,990.60 = 84,134.66/x
  3. Step 3: Cross multiply
    217,345.55x = 325,990.60 × 84,134.66
  4. Step 4: Simplify right side
    217,345.55x = 27,427,106,453.91
  5. Step 5: Solve for x
    x = 27,427,106,453.91/217,345.55
  6. Step 6: Final answer
    x = 126,191.25

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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.