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Finding the Fourth Proportional to 100,558.63, 138,764.77 and 55,227.79

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Solution

The fourth proportional to 100,558.63, 138,764.77 and 55,227.79 is: 76,210.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,558.63 : 138,764.77 = 55,227.79 : x
  2. Step 2: Convert to fraction form
    100,558.63/138,764.77 = 55,227.79/x
  3. Step 3: Cross multiply
    100,558.63x = 138,764.77 × 55,227.79
  4. Step 4: Simplify right side
    100,558.63x = 7,663,671,576.96
  5. Step 5: Solve for x
    x = 7,663,671,576.96/100,558.63
  6. Step 6: Final answer
    x = 76,210.98

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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.