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Finding the Fourth Proportional to 108,649.40, 149,942.48 and 60,918.12

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Solution

The fourth proportional to 108,649.40, 149,942.48 and 60,918.12 is: 84,070.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,649.40 : 149,942.48 = 60,918.12 : x
  2. Step 2: Convert to fraction form
    108,649.40/149,942.48 = 60,918.12/x
  3. Step 3: Cross multiply
    108,649.40x = 149,942.48 × 60,918.12
  4. Step 4: Simplify right side
    108,649.40x = 9,134,213,685.15
  5. Step 5: Solve for x
    x = 9,134,213,685.15/108,649.40
  6. Step 6: Final answer
    x = 84,070.54

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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.