Home / 81,528.54-122,253.31-47,803.78

Finding the Fourth Proportional to 81,528.54, 122,253.31 and 47,803.78

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Solution

The fourth proportional to 81,528.54, 122,253.31 and 47,803.78 is: 71,682.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,528.54 : 122,253.31 = 47,803.78 : x
  2. Step 2: Convert to fraction form
    81,528.54/122,253.31 = 47,803.78/x
  3. Step 3: Cross multiply
    81,528.54x = 122,253.31 × 47,803.78
  4. Step 4: Simplify right side
    81,528.54x = 5,844,170,335.51
  5. Step 5: Solve for x
    x = 5,844,170,335.51/81,528.54
  6. Step 6: Final answer
    x = 71,682.51

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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.