Home / 81,024.60-121,391.10-68,485.80

Finding the Fourth Proportional to 81,024.60, 121,391.10 and 68,485.80

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Solution

The fourth proportional to 81,024.60, 121,391.10 and 68,485.80 is: 102,605.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,024.60 : 121,391.10 = 68,485.80 : x
  2. Step 2: Convert to fraction form
    81,024.60/121,391.10 = 68,485.80/x
  3. Step 3: Cross multiply
    81,024.60x = 121,391.10 × 68,485.80
  4. Step 4: Simplify right side
    81,024.60x = 8,313,566,596.38
  5. Step 5: Solve for x
    x = 8,313,566,596.38/81,024.60
  6. Step 6: Final answer
    x = 102,605.46

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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.