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Finding the Fourth Proportional to 85,169.89, 127,809.51 and 57,121.63

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Solution

The fourth proportional to 85,169.89, 127,809.51 and 57,121.63 is: 85,719.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,169.89 : 127,809.51 = 57,121.63 : x
  2. Step 2: Convert to fraction form
    85,169.89/127,809.51 = 57,121.63/x
  3. Step 3: Cross multiply
    85,169.89x = 127,809.51 × 57,121.63
  4. Step 4: Simplify right side
    85,169.89x = 7,300,687,540.70
  5. Step 5: Solve for x
    x = 7,300,687,540.70/85,169.89
  6. Step 6: Final answer
    x = 85,719.11

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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.