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Finding the Fourth Proportional to 57,699.48, 86,321.64 and 43,699.98

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Solution

The fourth proportional to 57,699.48, 86,321.64 and 43,699.98 is: 65,377.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,699.48 : 86,321.64 = 43,699.98 : x
  2. Step 2: Convert to fraction form
    57,699.48/86,321.64 = 43,699.98/x
  3. Step 3: Cross multiply
    57,699.48x = 86,321.64 × 43,699.98
  4. Step 4: Simplify right side
    57,699.48x = 3,772,253,941.57
  5. Step 5: Solve for x
    x = 3,772,253,941.57/57,699.48
  6. Step 6: Final answer
    x = 65,377.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.