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Finding the Fourth Proportional to 73,939.31, 102,036.17 and 40,405.31

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Solution

The fourth proportional to 73,939.31, 102,036.17 and 40,405.31 is: 55,759.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,939.31 : 102,036.17 = 40,405.31 : x
  2. Step 2: Convert to fraction form
    73,939.31/102,036.17 = 40,405.31/x
  3. Step 3: Cross multiply
    73,939.31x = 102,036.17 × 40,405.31
  4. Step 4: Simplify right side
    73,939.31x = 4,122,802,367.86
  5. Step 5: Solve for x
    x = 4,122,802,367.86/73,939.31
  6. Step 6: Final answer
    x = 55,759.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.