Home / 100,491.21-138,677.28-55,169.94

Finding the Fourth Proportional to 100,491.21, 138,677.28 and 55,169.94

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Solution

The fourth proportional to 100,491.21, 138,677.28 and 55,169.94 is: 76,134.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,491.21 : 138,677.28 = 55,169.94 : x
  2. Step 2: Convert to fraction form
    100,491.21/138,677.28 = 55,169.94/x
  3. Step 3: Cross multiply
    100,491.21x = 138,677.28 × 55,169.94
  4. Step 4: Simplify right side
    100,491.21x = 7,650,817,216.96
  5. Step 5: Solve for x
    x = 7,650,817,216.96/100,491.21
  6. Step 6: Final answer
    x = 76,134.19

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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.