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Finding the Fourth Proportional to 122,190.65, 168,614.54 and 67,742.31

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Solution

The fourth proportional to 122,190.65, 168,614.54 and 67,742.31 is: 93,479.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,190.65 : 168,614.54 = 67,742.31 : x
  2. Step 2: Convert to fraction form
    122,190.65/168,614.54 = 67,742.31/x
  3. Step 3: Cross multiply
    122,190.65x = 168,614.54 × 67,742.31
  4. Step 4: Simplify right side
    122,190.65x = 11,422,338,986.81
  5. Step 5: Solve for x
    x = 11,422,338,986.81/122,190.65
  6. Step 6: Final answer
    x = 93,479.65

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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.