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Finding the Fourth Proportional to 251,791.13, 377,649.40 and 91,829.54

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Solution

The fourth proportional to 251,791.13, 377,649.40 and 91,829.54 is: 137,730.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,791.13 : 377,649.40 = 91,829.54 : x
  2. Step 2: Convert to fraction form
    251,791.13/377,649.40 = 91,829.54/x
  3. Step 3: Cross multiply
    251,791.13x = 377,649.40 × 91,829.54
  4. Step 4: Simplify right side
    251,791.13x = 34,679,371,397.83
  5. Step 5: Solve for x
    x = 34,679,371,397.83/251,791.13
  6. Step 6: Final answer
    x = 137,730.71

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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.