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Finding the Fourth Proportional to 119,799.62, 165,376.60 and 77,378.84

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Solution

The fourth proportional to 119,799.62, 165,376.60 and 77,378.84 is: 106,817.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,799.62 : 165,376.60 = 77,378.84 : x
  2. Step 2: Convert to fraction form
    119,799.62/165,376.60 = 77,378.84/x
  3. Step 3: Cross multiply
    119,799.62x = 165,376.60 × 77,378.84
  4. Step 4: Simplify right side
    119,799.62x = 12,796,649,471.14
  5. Step 5: Solve for x
    x = 12,796,649,471.14/119,799.62
  6. Step 6: Final answer
    x = 106,817.11

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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.