Home / 81,056.34-121,596.66-28,456.56

Finding the Fourth Proportional to 81,056.34, 121,596.66 and 28,456.56

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Solution

The fourth proportional to 81,056.34, 121,596.66 and 28,456.56 is: 42,689.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,056.34 : 121,596.66 = 28,456.56 : x
  2. Step 2: Convert to fraction form
    81,056.34/121,596.66 = 28,456.56/x
  3. Step 3: Cross multiply
    81,056.34x = 121,596.66 × 28,456.56
  4. Step 4: Simplify right side
    81,056.34x = 3,460,222,651.09
  5. Step 5: Solve for x
    x = 3,460,222,651.09/81,056.34
  6. Step 6: Final answer
    x = 42,689.11

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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.