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Finding the Fourth Proportional to 108,356.50, 149,538.60 and 60,613.06

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Solution

The fourth proportional to 108,356.50, 149,538.60 and 60,613.06 is: 83,649.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,356.50 : 149,538.60 = 60,613.06 : x
  2. Step 2: Convert to fraction form
    108,356.50/149,538.60 = 60,613.06/x
  3. Step 3: Cross multiply
    108,356.50x = 149,538.60 × 60,613.06
  4. Step 4: Simplify right side
    108,356.50x = 9,063,992,134.12
  5. Step 5: Solve for x
    x = 9,063,992,134.12/108,356.50
  6. Step 6: Final answer
    x = 83,649.73

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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.