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Finding the Fourth Proportional to 120,093.71, 165,737.91 and 66,377.58

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Solution

The fourth proportional to 120,093.71, 165,737.91 and 66,377.58 is: 91,605.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,093.71 : 165,737.91 = 66,377.58 : x
  2. Step 2: Convert to fraction form
    120,093.71/165,737.91 = 66,377.58/x
  3. Step 3: Cross multiply
    120,093.71x = 165,737.91 × 66,377.58
  4. Step 4: Simplify right side
    120,093.71x = 11,001,281,007.46
  5. Step 5: Solve for x
    x = 11,001,281,007.46/120,093.71
  6. Step 6: Final answer
    x = 91,605.81

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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.