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Finding the Fourth Proportional to 221,109.60, 331,707.60 and 87,967.20

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Solution

The fourth proportional to 221,109.60, 331,707.60 and 87,967.20 is: 131,967.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,109.60 : 331,707.60 = 87,967.20 : x
  2. Step 2: Convert to fraction form
    221,109.60/331,707.60 = 87,967.20/x
  3. Step 3: Cross multiply
    221,109.60x = 331,707.60 × 87,967.20
  4. Step 4: Simplify right side
    221,109.60x = 29,179,388,790.72
  5. Step 5: Solve for x
    x = 29,179,388,790.72/221,109.60
  6. Step 6: Final answer
    x = 131,967.99

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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.