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Finding the Fourth Proportional to 68,721.48, 103,550.31 and 56,514.87

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Solution

The fourth proportional to 68,721.48, 103,550.31 and 56,514.87 is: 85,157.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,721.48 : 103,550.31 = 56,514.87 : x
  2. Step 2: Convert to fraction form
    68,721.48/103,550.31 = 56,514.87/x
  3. Step 3: Cross multiply
    68,721.48x = 103,550.31 × 56,514.87
  4. Step 4: Simplify right side
    68,721.48x = 5,852,132,308.11
  5. Step 5: Solve for x
    x = 5,852,132,308.11/68,721.48
  6. Step 6: Final answer
    x = 85,157.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.