Home / 221,420.79-331,933.95-81,146.61

Finding the Fourth Proportional to 221,420.79, 331,933.95 and 81,146.61

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Solution

The fourth proportional to 221,420.79, 331,933.95 and 81,146.61 is: 121,647.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,420.79 : 331,933.95 = 81,146.61 : x
  2. Step 2: Convert to fraction form
    221,420.79/331,933.95 = 81,146.61/x
  3. Step 3: Cross multiply
    221,420.79x = 331,933.95 × 81,146.61
  4. Step 4: Simplify right side
    221,420.79x = 26,935,314,786.41
  5. Step 5: Solve for x
    x = 26,935,314,786.41/221,420.79
  6. Step 6: Final answer
    x = 121,647.63

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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.