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Finding the Fourth Proportional to 120,785.71, 166,699.67 and 73,039.41

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Solution

The fourth proportional to 120,785.71, 166,699.67 and 73,039.41 is: 100,803.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,785.71 : 166,699.67 = 73,039.41 : x
  2. Step 2: Convert to fraction form
    120,785.71/166,699.67 = 73,039.41/x
  3. Step 3: Cross multiply
    120,785.71x = 166,699.67 × 73,039.41
  4. Step 4: Simplify right side
    120,785.71x = 12,175,645,543.99
  5. Step 5: Solve for x
    x = 12,175,645,543.99/120,785.71
  6. Step 6: Final answer
    x = 100,803.69

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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.