Home / 89,905.82-124,116.68-65,679.59

Finding the Fourth Proportional to 89,905.82, 124,116.68 and 65,679.59

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Solution

The fourth proportional to 89,905.82, 124,116.68 and 65,679.59 is: 90,671.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,905.82 : 124,116.68 = 65,679.59 : x
  2. Step 2: Convert to fraction form
    89,905.82/124,116.68 = 65,679.59/x
  3. Step 3: Cross multiply
    89,905.82x = 124,116.68 × 65,679.59
  4. Step 4: Simplify right side
    89,905.82x = 8,151,933,129.05
  5. Step 5: Solve for x
    x = 8,151,933,129.05/89,905.82
  6. Step 6: Final answer
    x = 90,671.92

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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.