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Finding the Fourth Proportional to 108,060.78, 149,202.90 and 69,842.96

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Solution

The fourth proportional to 108,060.78, 149,202.90 and 69,842.96 is: 96,434.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,060.78 : 149,202.90 = 69,842.96 : x
  2. Step 2: Convert to fraction form
    108,060.78/149,202.90 = 69,842.96/x
  3. Step 3: Cross multiply
    108,060.78x = 149,202.90 × 69,842.96
  4. Step 4: Simplify right side
    108,060.78x = 10,420,772,176.58
  5. Step 5: Solve for x
    x = 10,420,772,176.58/108,060.78
  6. Step 6: Final answer
    x = 96,434.36

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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.