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Finding the Fourth Proportional to 100,741.44, 139,027.86 and 58,291.76

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Solution

The fourth proportional to 100,741.44, 139,027.86 and 58,291.76 is: 80,445.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,741.44 : 139,027.86 = 58,291.76 : x
  2. Step 2: Convert to fraction form
    100,741.44/139,027.86 = 58,291.76/x
  3. Step 3: Cross multiply
    100,741.44x = 139,027.86 × 58,291.76
  4. Step 4: Simplify right side
    100,741.44x = 8,104,178,648.43
  5. Step 5: Solve for x
    x = 8,104,178,648.43/100,741.44
  6. Step 6: Final answer
    x = 80,445.33

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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.