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Finding the Fourth Proportional to 136,684.80, 204,638.40 and 121,132.80

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Solution

The fourth proportional to 136,684.80, 204,638.40 and 121,132.80 is: 181,354.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,684.80 : 204,638.40 = 121,132.80 : x
  2. Step 2: Convert to fraction form
    136,684.80/204,638.40 = 121,132.80/x
  3. Step 3: Cross multiply
    136,684.80x = 204,638.40 × 121,132.80
  4. Step 4: Simplify right side
    136,684.80x = 24,788,422,379.52
  5. Step 5: Solve for x
    x = 24,788,422,379.52/136,684.80
  6. Step 6: Final answer
    x = 181,354.64

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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.