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Finding the Fourth Proportional to 121,609.64, 182,290.52 and 68,907.80

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Solution

The fourth proportional to 121,609.64, 182,290.52 and 68,907.80 is: 103,291.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,609.64 : 182,290.52 = 68,907.80 : x
  2. Step 2: Convert to fraction form
    121,609.64/182,290.52 = 68,907.80/x
  3. Step 3: Cross multiply
    121,609.64x = 182,290.52 × 68,907.80
  4. Step 4: Simplify right side
    121,609.64x = 12,561,237,438.06
  5. Step 5: Solve for x
    x = 12,561,237,438.06/121,609.64
  6. Step 6: Final answer
    x = 103,291.47

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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.