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Finding the Fourth Proportional to 80,999.70, 121,491.10 and 21,831.76

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Solution

The fourth proportional to 80,999.70, 121,491.10 and 21,831.76 is: 32,745.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,999.70 : 121,491.10 = 21,831.76 : x
  2. Step 2: Convert to fraction form
    80,999.70/121,491.10 = 21,831.76/x
  3. Step 3: Cross multiply
    80,999.70x = 121,491.10 × 21,831.76
  4. Step 4: Simplify right side
    80,999.70x = 2,652,364,537.34
  5. Step 5: Solve for x
    x = 2,652,364,537.34/80,999.70
  6. Step 6: Final answer
    x = 32,745.36

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1.5x scale

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.