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Finding the Fourth Proportional to 57,939.79, 86,751.63 and 43,857.13

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Solution

The fourth proportional to 57,939.79, 86,751.63 and 43,857.13 is: 65,666.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,939.79 : 86,751.63 = 43,857.13 : x
  2. Step 2: Convert to fraction form
    57,939.79/86,751.63 = 43,857.13/x
  3. Step 3: Cross multiply
    57,939.79x = 86,751.63 × 43,857.13
  4. Step 4: Simplify right side
    57,939.79x = 3,804,677,297.74
  5. Step 5: Solve for x
    x = 3,804,677,297.74/57,939.79
  6. Step 6: Final answer
    x = 65,666.06

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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.