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Finding the Fourth Proportional to 71,910.31, 99,171.77 and 45,055.77

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Solution

The fourth proportional to 71,910.31, 99,171.77 and 45,055.77 is: 62,136.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,910.31 : 99,171.77 = 45,055.77 : x
  2. Step 2: Convert to fraction form
    71,910.31/99,171.77 = 45,055.77/x
  3. Step 3: Cross multiply
    71,910.31x = 99,171.77 × 45,055.77
  4. Step 4: Simplify right side
    71,910.31x = 4,468,259,963.75
  5. Step 5: Solve for x
    x = 4,468,259,963.75/71,910.31
  6. Step 6: Final answer
    x = 62,136.57

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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.