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Finding the Fourth Proportional to 72,959.42, 100,684 and 39,425.42

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Solution

The fourth proportional to 72,959.42, 100,684 and 39,425.42 is: 54,407.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,959.42 : 100,684 = 39,425.42 : x
  2. Step 2: Convert to fraction form
    72,959.42/100,684 = 39,425.42/x
  3. Step 3: Cross multiply
    72,959.42x = 100,684 × 39,425.42
  4. Step 4: Simplify right side
    72,959.42x = 3,969,508,987.28
  5. Step 5: Solve for x
    x = 3,969,508,987.28/72,959.42
  6. Step 6: Final answer
    x = 54,407.08

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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.