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Finding the Fourth Proportional to 91,907.72, 137,862.25 and 25,351.64

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Solution

The fourth proportional to 91,907.72, 137,862.25 and 25,351.64 is: 38,027.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,907.72 : 137,862.25 = 25,351.64 : x
  2. Step 2: Convert to fraction form
    91,907.72/137,862.25 = 25,351.64/x
  3. Step 3: Cross multiply
    91,907.72x = 137,862.25 × 25,351.64
  4. Step 4: Simplify right side
    91,907.72x = 3,495,034,131.59
  5. Step 5: Solve for x
    x = 3,495,034,131.59/91,907.72
  6. Step 6: Final answer
    x = 38,027.64

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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.