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Finding the Fourth Proportional to 91,297.82, 125,978.48 and 51,006.58

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Solution

The fourth proportional to 91,297.82, 125,978.48 and 51,006.58 is: 70,382.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,297.82 : 125,978.48 = 51,006.58 : x
  2. Step 2: Convert to fraction form
    91,297.82/125,978.48 = 51,006.58/x
  3. Step 3: Cross multiply
    91,297.82x = 125,978.48 × 51,006.58
  4. Step 4: Simplify right side
    91,297.82x = 6,425,731,418.40
  5. Step 5: Solve for x
    x = 6,425,731,418.40/91,297.82
  6. Step 6: Final answer
    x = 70,382.09

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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.