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Finding the Fourth Proportional to 215,804.25, 323,837.60 and 91,145.25

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Solution

The fourth proportional to 215,804.25, 323,837.60 and 91,145.25 is: 136,773.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,804.25 : 323,837.60 = 91,145.25 : x
  2. Step 2: Convert to fraction form
    215,804.25/323,837.60 = 91,145.25/x
  3. Step 3: Cross multiply
    215,804.25x = 323,837.60 × 91,145.25
  4. Step 4: Simplify right side
    215,804.25x = 29,516,258,555.67
  5. Step 5: Solve for x
    x = 29,516,258,555.67/215,804.25
  6. Step 6: Final answer
    x = 136,773.30

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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.