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Finding the Fourth Proportional to 72,649.25, 100,219.40 and 63,076.11

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Solution

The fourth proportional to 72,649.25, 100,219.40 and 63,076.11 is: 87,013.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,649.25 : 100,219.40 = 63,076.11 : x
  2. Step 2: Convert to fraction form
    72,649.25/100,219.40 = 63,076.11/x
  3. Step 3: Cross multiply
    72,649.25x = 100,219.40 × 63,076.11
  4. Step 4: Simplify right side
    72,649.25x = 6,321,449,583.15
  5. Step 5: Solve for x
    x = 6,321,449,583.15/72,649.25
  6. Step 6: Final answer
    x = 87,013.29

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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.