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Finding the Fourth Proportional to 85,150.64, 127,745.82 and 25,986.20

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Solution

The fourth proportional to 85,150.64, 127,745.82 and 25,986.20 is: 38,985.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,150.64 : 127,745.82 = 25,986.20 : x
  2. Step 2: Convert to fraction form
    85,150.64/127,745.82 = 25,986.20/x
  3. Step 3: Cross multiply
    85,150.64x = 127,745.82 × 25,986.20
  4. Step 4: Simplify right side
    85,150.64x = 3,319,628,427.68
  5. Step 5: Solve for x
    x = 3,319,628,427.68/85,150.64
  6. Step 6: Final answer
    x = 38,985.36

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1.5x scale

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.