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Finding the Fourth Proportional to 56,939.68, 78,537.24 and 39,036.28

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Solution

The fourth proportional to 56,939.68, 78,537.24 and 39,036.28 is: 53,842.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,939.68 : 78,537.24 = 39,036.28 : x
  2. Step 2: Convert to fraction form
    56,939.68/78,537.24 = 39,036.28/x
  3. Step 3: Cross multiply
    56,939.68x = 78,537.24 × 39,036.28
  4. Step 4: Simplify right side
    56,939.68x = 3,065,801,691.07
  5. Step 5: Solve for x
    x = 3,065,801,691.07/56,939.68
  6. Step 6: Final answer
    x = 53,842.97

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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.