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Finding the Fourth Proportional to 108,638.58, 149,912.88 and 60,882.64

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Solution

The fourth proportional to 108,638.58, 149,912.88 and 60,882.64 is: 84,013.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,638.58 : 149,912.88 = 60,882.64 : x
  2. Step 2: Convert to fraction form
    108,638.58/149,912.88 = 60,882.64/x
  3. Step 3: Cross multiply
    108,638.58x = 149,912.88 × 60,882.64
  4. Step 4: Simplify right side
    108,638.58x = 9,127,091,904.40
  5. Step 5: Solve for x
    x = 9,127,091,904.40/108,638.58
  6. Step 6: Final answer
    x = 84,013.36

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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.