Home / 100,822.64-139,121.10-66,778.34

Finding the Fourth Proportional to 100,822.64, 139,121.10 and 66,778.34

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Solution

The fourth proportional to 100,822.64, 139,121.10 and 66,778.34 is: 92,144.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,822.64 : 139,121.10 = 66,778.34 : x
  2. Step 2: Convert to fraction form
    100,822.64/139,121.10 = 66,778.34/x
  3. Step 3: Cross multiply
    100,822.64x = 139,121.10 × 66,778.34
  4. Step 4: Simplify right side
    100,822.64x = 9,290,276,116.97
  5. Step 5: Solve for x
    x = 9,290,276,116.97/100,822.64
  6. Step 6: Final answer
    x = 92,144.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.