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Finding the Fourth Proportional to 64,083.59, 87,793.05 and 61,687.68

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Solution

The fourth proportional to 64,083.59, 87,793.05 and 61,687.68 is: 84,510.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,083.59 : 87,793.05 = 61,687.68 : x
  2. Step 2: Convert to fraction form
    64,083.59/87,793.05 = 61,687.68/x
  3. Step 3: Cross multiply
    64,083.59x = 87,793.05 × 61,687.68
  4. Step 4: Simplify right side
    64,083.59x = 5,415,749,574.62
  5. Step 5: Solve for x
    x = 5,415,749,574.62/64,083.59
  6. Step 6: Final answer
    x = 84,510.71

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.