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Finding the Fourth Proportional to 108,172.91, 162,181.60 and 48,978.11

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Solution

The fourth proportional to 108,172.91, 162,181.60 and 48,978.11 is: 73,431.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,172.91 : 162,181.60 = 48,978.11 : x
  2. Step 2: Convert to fraction form
    108,172.91/162,181.60 = 48,978.11/x
  3. Step 3: Cross multiply
    108,172.91x = 162,181.60 × 48,978.11
  4. Step 4: Simplify right side
    108,172.91x = 7,943,348,244.78
  5. Step 5: Solve for x
    x = 7,943,348,244.78/108,172.91
  6. Step 6: Final answer
    x = 73,431.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.