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Finding the Fourth Proportional to 117,387.12, 161,993.28 and 63,672

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Solution

The fourth proportional to 117,387.12, 161,993.28 and 63,672 is: 87,866.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,387.12 : 161,993.28 = 63,672 : x
  2. Step 2: Convert to fraction form
    117,387.12/161,993.28 = 63,672/x
  3. Step 3: Cross multiply
    117,387.12x = 161,993.28 × 63,672
  4. Step 4: Simplify right side
    117,387.12x = 10,314,436,124.16
  5. Step 5: Solve for x
    x = 10,314,436,124.16/117,387.12
  6. Step 6: Final answer
    x = 87,866.85

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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.