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Finding the Fourth Proportional to 91,857.87, 126,759.72 and 51,570.90

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Solution

The fourth proportional to 91,857.87, 126,759.72 and 51,570.90 is: 71,165.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,857.87 : 126,759.72 = 51,570.90 : x
  2. Step 2: Convert to fraction form
    91,857.87/126,759.72 = 51,570.90/x
  3. Step 3: Cross multiply
    91,857.87x = 126,759.72 × 51,570.90
  4. Step 4: Simplify right side
    91,857.87x = 6,537,112,844.15
  5. Step 5: Solve for x
    x = 6,537,112,844.15/91,857.87
  6. Step 6: Final answer
    x = 71,165.52

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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.