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Finding the Fourth Proportional to 85,105.74, 127,672.46 and 25,140.30

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Solution

The fourth proportional to 85,105.74, 127,672.46 and 25,140.30 is: 37,714.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,105.74 : 127,672.46 = 25,140.30 : x
  2. Step 2: Convert to fraction form
    85,105.74/127,672.46 = 25,140.30/x
  3. Step 3: Cross multiply
    85,105.74x = 127,672.46 × 25,140.30
  4. Step 4: Simplify right side
    85,105.74x = 3,209,723,946.14
  5. Step 5: Solve for x
    x = 3,209,723,946.14/85,105.74
  6. Step 6: Final answer
    x = 37,714.54

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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.