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Finding the Fourth Proportional to 119,809.65, 165,335.25 and 66,099.81

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Solution

The fourth proportional to 119,809.65, 165,335.25 and 66,099.81 is: 91,216.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,809.65 : 165,335.25 = 66,099.81 : x
  2. Step 2: Convert to fraction form
    119,809.65/165,335.25 = 66,099.81/x
  3. Step 3: Cross multiply
    119,809.65x = 165,335.25 × 66,099.81
  4. Step 4: Simplify right side
    119,809.65x = 10,928,628,611.30
  5. Step 5: Solve for x
    x = 10,928,628,611.30/119,809.65
  6. Step 6: Final answer
    x = 91,216.60

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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.