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Finding the Fourth Proportional to 117,388.28, 161,994.30 and 63,671.78

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Solution

The fourth proportional to 117,388.28, 161,994.30 and 63,671.78 is: 87,866.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,388.28 : 161,994.30 = 63,671.78 : x
  2. Step 2: Convert to fraction form
    117,388.28/161,994.30 = 63,671.78/x
  3. Step 3: Cross multiply
    117,388.28x = 161,994.30 × 63,671.78
  4. Step 4: Simplify right side
    117,388.28x = 10,314,465,430.85
  5. Step 5: Solve for x
    x = 10,314,465,430.85/117,388.28
  6. Step 6: Final answer
    x = 87,866.23

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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.