Home / 81,212.96-121,764-43,267.90

Finding the Fourth Proportional to 81,212.96, 121,764 and 43,267.90

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Solution

The fourth proportional to 81,212.96, 121,764 and 43,267.90 is: 64,872.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,212.96 : 121,764 = 43,267.90 : x
  2. Step 2: Convert to fraction form
    81,212.96/121,764 = 43,267.90/x
  3. Step 3: Cross multiply
    81,212.96x = 121,764 × 43,267.90
  4. Step 4: Simplify right side
    81,212.96x = 5,268,472,575.60
  5. Step 5: Solve for x
    x = 5,268,472,575.60/81,212.96
  6. Step 6: Final answer
    x = 64,872.31

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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.