Home / 81,151.56-121,694.40-28,548.72

Finding the Fourth Proportional to 81,151.56, 121,694.40 and 28,548.72

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Solution

The fourth proportional to 81,151.56, 121,694.40 and 28,548.72 is: 42,811.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,151.56 : 121,694.40 = 28,548.72 : x
  2. Step 2: Convert to fraction form
    81,151.56/121,694.40 = 28,548.72/x
  3. Step 3: Cross multiply
    81,151.56x = 121,694.40 × 28,548.72
  4. Step 4: Simplify right side
    81,151.56x = 3,474,219,351.17
  5. Step 5: Solve for x
    x = 3,474,219,351.17/81,151.56
  6. Step 6: Final answer
    x = 42,811.49

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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.