Home / 81,340.55-121,992.60-53,456.30

Finding the Fourth Proportional to 81,340.55, 121,992.60 and 53,456.30

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Solution

The fourth proportional to 81,340.55, 121,992.60 and 53,456.30 is: 80,172.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,340.55 : 121,992.60 = 53,456.30 : x
  2. Step 2: Convert to fraction form
    81,340.55/121,992.60 = 53,456.30/x
  3. Step 3: Cross multiply
    81,340.55x = 121,992.60 × 53,456.30
  4. Step 4: Simplify right side
    81,340.55x = 6,521,273,023.38
  5. Step 5: Solve for x
    x = 6,521,273,023.38/81,340.55
  6. Step 6: Final answer
    x = 80,172.47

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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.