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Finding the Fourth Proportional to 221,101.60, 331,699.62 and 71,350.40

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Solution

The fourth proportional to 221,101.60, 331,699.62 and 71,350.40 is: 107,040.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,101.60 : 331,699.62 = 71,350.40 : x
  2. Step 2: Convert to fraction form
    221,101.60/331,699.62 = 71,350.40/x
  3. Step 3: Cross multiply
    221,101.60x = 331,699.62 × 71,350.40
  4. Step 4: Simplify right side
    221,101.60x = 23,666,900,566.85
  5. Step 5: Solve for x
    x = 23,666,900,566.85/221,101.60
  6. Step 6: Final answer
    x = 107,040.84

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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.