Home / 221,101.96-331,571.34-78,909.19

Finding the Fourth Proportional to 221,101.96, 331,571.34 and 78,909.19

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Solution

The fourth proportional to 221,101.96, 331,571.34 and 78,909.19 is: 118,334.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,101.96 : 331,571.34 = 78,909.19 : x
  2. Step 2: Convert to fraction form
    221,101.96/331,571.34 = 78,909.19/x
  3. Step 3: Cross multiply
    221,101.96x = 331,571.34 × 78,909.19
  4. Step 4: Simplify right side
    221,101.96x = 26,164,025,866.61
  5. Step 5: Solve for x
    x = 26,164,025,866.61/221,101.96
  6. Step 6: Final answer
    x = 118,334.66

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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.