Home / 81,381.96-121,820.22-52,880.76

Finding the Fourth Proportional to 81,381.96, 121,820.22 and 52,880.76

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Solution

The fourth proportional to 81,381.96, 121,820.22 and 52,880.76 is: 79,156.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,381.96 : 121,820.22 = 52,880.76 : x
  2. Step 2: Convert to fraction form
    81,381.96/121,820.22 = 52,880.76/x
  3. Step 3: Cross multiply
    81,381.96x = 121,820.22 × 52,880.76
  4. Step 4: Simplify right side
    81,381.96x = 6,441,945,816.97
  5. Step 5: Solve for x
    x = 6,441,945,816.97/81,381.96
  6. Step 6: Final answer
    x = 79,156.93

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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.