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Finding the Fourth Proportional to 85,013.70, 127,512.35 and 25,849.88

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Solution

The fourth proportional to 85,013.70, 127,512.35 and 25,849.88 is: 38,772.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,013.70 : 127,512.35 = 25,849.88 : x
  2. Step 2: Convert to fraction form
    85,013.70/127,512.35 = 25,849.88/x
  3. Step 3: Cross multiply
    85,013.70x = 127,512.35 × 25,849.88
  4. Step 4: Simplify right side
    85,013.70x = 3,296,178,816.77
  5. Step 5: Solve for x
    x = 3,296,178,816.77/85,013.70
  6. Step 6: Final answer
    x = 38,772.33

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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.