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Finding the Fourth Proportional to 215,763.72, 323,610.90 and 91,088.52

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Solution

The fourth proportional to 215,763.72, 323,610.90 and 91,088.52 is: 136,618.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,763.72 : 323,610.90 = 91,088.52 : x
  2. Step 2: Convert to fraction form
    215,763.72/323,610.90 = 91,088.52/x
  3. Step 3: Cross multiply
    215,763.72x = 323,610.90 × 91,088.52
  4. Step 4: Simplify right side
    215,763.72x = 29,477,237,936.87
  5. Step 5: Solve for x
    x = 29,477,237,936.87/215,763.72
  6. Step 6: Final answer
    x = 136,618.14

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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.