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Finding the Fourth Proportional to 108,676.68, 149,974.20 and 68,417.10

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Solution

The fourth proportional to 108,676.68, 149,974.20 and 68,417.10 is: 94,415.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,676.68 : 149,974.20 = 68,417.10 : x
  2. Step 2: Convert to fraction form
    108,676.68/149,974.20 = 68,417.10/x
  3. Step 3: Cross multiply
    108,676.68x = 149,974.20 × 68,417.10
  4. Step 4: Simplify right side
    108,676.68x = 10,260,799,838.82
  5. Step 5: Solve for x
    x = 10,260,799,838.82/108,676.68
  6. Step 6: Final answer
    x = 94,415.84

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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.