Home / 80,874.25-121,134.76-66,674.81

Finding the Fourth Proportional to 80,874.25, 121,134.76 and 66,674.81

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Solution

The fourth proportional to 80,874.25, 121,134.76 and 66,674.81 is: 99,866.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,874.25 : 121,134.76 = 66,674.81 : x
  2. Step 2: Convert to fraction form
    80,874.25/121,134.76 = 66,674.81/x
  3. Step 3: Cross multiply
    80,874.25x = 121,134.76 × 66,674.81
  4. Step 4: Simplify right side
    80,874.25x = 8,076,637,243.55
  5. Step 5: Solve for x
    x = 8,076,637,243.55/80,874.25
  6. Step 6: Final answer
    x = 99,866.61

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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.