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Finding the Fourth Proportional to 120,817.71, 181,291.77 and 70,995.15

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Solution

The fourth proportional to 120,817.71, 181,291.77 and 70,995.15 is: 106,531.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,817.71 : 181,291.77 = 70,995.15 : x
  2. Step 2: Convert to fraction form
    120,817.71/181,291.77 = 70,995.15/x
  3. Step 3: Cross multiply
    120,817.71x = 181,291.77 × 70,995.15
  4. Step 4: Simplify right side
    120,817.71x = 12,870,836,404.92
  5. Step 5: Solve for x
    x = 12,870,836,404.92/120,817.71
  6. Step 6: Final answer
    x = 106,531.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.