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Finding the Fourth Proportional to 72,484.26, 100,026.35 and 39,778.58

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Solution

The fourth proportional to 72,484.26, 100,026.35 and 39,778.58 is: 54,893.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,484.26 : 100,026.35 = 39,778.58 : x
  2. Step 2: Convert to fraction form
    72,484.26/100,026.35 = 39,778.58/x
  3. Step 3: Cross multiply
    72,484.26x = 100,026.35 × 39,778.58
  4. Step 4: Simplify right side
    72,484.26x = 3,978,905,466.56
  5. Step 5: Solve for x
    x = 3,978,905,466.56/72,484.26
  6. Step 6: Final answer
    x = 54,893.37

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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.