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Finding the Fourth Proportional to 107,308.67, 148,092.89 and 61,988.56

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Solution

The fourth proportional to 107,308.67, 148,092.89 and 61,988.56 is: 85,548.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,308.67 : 148,092.89 = 61,988.56 : x
  2. Step 2: Convert to fraction form
    107,308.67/148,092.89 = 61,988.56/x
  3. Step 3: Cross multiply
    107,308.67x = 148,092.89 × 61,988.56
  4. Step 4: Simplify right side
    107,308.67x = 9,180,064,317.16
  5. Step 5: Solve for x
    x = 9,180,064,317.16/107,308.67
  6. Step 6: Final answer
    x = 85,548.21

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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.