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Finding the Fourth Proportional to 120,811.18, 181,063.68 and 68,250.28

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Solution

The fourth proportional to 120,811.18, 181,063.68 and 68,250.28 is: 102,288.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,811.18 : 181,063.68 = 68,250.28 : x
  2. Step 2: Convert to fraction form
    120,811.18/181,063.68 = 68,250.28/x
  3. Step 3: Cross multiply
    120,811.18x = 181,063.68 × 68,250.28
  4. Step 4: Simplify right side
    120,811.18x = 12,357,646,857.83
  5. Step 5: Solve for x
    x = 12,357,646,857.83/120,811.18
  6. Step 6: Final answer
    x = 102,288.93

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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.