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Finding the Fourth Proportional to 98,012.43, 135,199.44 and 61,655.94

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Solution

The fourth proportional to 98,012.43, 135,199.44 and 61,655.94 is: 85,048.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,012.43 : 135,199.44 = 61,655.94 : x
  2. Step 2: Convert to fraction form
    98,012.43/135,199.44 = 61,655.94/x
  3. Step 3: Cross multiply
    98,012.43x = 135,199.44 × 61,655.94
  4. Step 4: Simplify right side
    98,012.43x = 8,335,848,560.67
  5. Step 5: Solve for x
    x = 8,335,848,560.67/98,012.43
  6. Step 6: Final answer
    x = 85,048.89

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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.