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Finding the Fourth Proportional to 108,453.62, 149,669.42 and 63,147.48

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Solution

The fourth proportional to 108,453.62, 149,669.42 and 63,147.48 is: 87,145.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,453.62 : 149,669.42 = 63,147.48 : x
  2. Step 2: Convert to fraction form
    108,453.62/149,669.42 = 63,147.48/x
  3. Step 3: Cross multiply
    108,453.62x = 149,669.42 × 63,147.48
  4. Step 4: Simplify right side
    108,453.62x = 9,451,246,390.32
  5. Step 5: Solve for x
    x = 9,451,246,390.32/108,453.62
  6. Step 6: Final answer
    x = 87,145.52

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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.