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Finding the Fourth Proportional to 61,129.79, 84,281.60 and 43,687.97

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Solution

The fourth proportional to 61,129.79, 84,281.60 and 43,687.97 is: 60,233.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,129.79 : 84,281.60 = 43,687.97 : x
  2. Step 2: Convert to fraction form
    61,129.79/84,281.60 = 43,687.97/x
  3. Step 3: Cross multiply
    61,129.79x = 84,281.60 × 43,687.97
  4. Step 4: Simplify right side
    61,129.79x = 3,682,091,372.50
  5. Step 5: Solve for x
    x = 3,682,091,372.50/61,129.79
  6. Step 6: Final answer
    x = 60,233.99

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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.