Home / 81,437.24-121,508.38-71,464.52

Finding the Fourth Proportional to 81,437.24, 121,508.38 and 71,464.52

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Solution

The fourth proportional to 81,437.24, 121,508.38 and 71,464.52 is: 106,628.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,437.24 : 121,508.38 = 71,464.52 : x
  2. Step 2: Convert to fraction form
    81,437.24/121,508.38 = 71,464.52/x
  3. Step 3: Cross multiply
    81,437.24x = 121,508.38 × 71,464.52
  4. Step 4: Simplify right side
    81,437.24x = 8,683,538,052.68
  5. Step 5: Solve for x
    x = 8,683,538,052.68/81,437.24
  6. Step 6: Final answer
    x = 106,628.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.