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Finding the Fourth Proportional to 36,086.40, 54,064.80 and 31,939.20

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Solution

The fourth proportional to 36,086.40, 54,064.80 and 31,939.20 is: 47,851.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,086.40 : 54,064.80 = 31,939.20 : x
  2. Step 2: Convert to fraction form
    36,086.40/54,064.80 = 31,939.20/x
  3. Step 3: Cross multiply
    36,086.40x = 54,064.80 × 31,939.20
  4. Step 4: Simplify right side
    36,086.40x = 1,726,786,460.16
  5. Step 5: Solve for x
    x = 1,726,786,460.16/36,086.40
  6. Step 6: Final answer
    x = 47,851.45

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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.