Home / 85,129.86-127,694.40-25,965.36

Finding the Fourth Proportional to 85,129.86, 127,694.40 and 25,965.36

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Solution

The fourth proportional to 85,129.86, 127,694.40 and 25,965.36 is: 38,947.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,129.86 : 127,694.40 = 25,965.36 : x
  2. Step 2: Convert to fraction form
    85,129.86/127,694.40 = 25,965.36/x
  3. Step 3: Cross multiply
    85,129.86x = 127,694.40 × 25,965.36
  4. Step 4: Simplify right side
    85,129.86x = 3,315,631,065.98
  5. Step 5: Solve for x
    x = 3,315,631,065.98/85,129.86
  6. Step 6: Final answer
    x = 38,947.92

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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.