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Finding the Fourth Proportional to 136,683.80, 204,636.90 and 121,131.80

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Solution

The fourth proportional to 136,683.80, 204,636.90 and 121,131.80 is: 181,353.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,683.80 : 204,636.90 = 121,131.80 : x
  2. Step 2: Convert to fraction form
    136,683.80/204,636.90 = 121,131.80/x
  3. Step 3: Cross multiply
    136,683.80x = 204,636.90 × 121,131.80
  4. Step 4: Simplify right side
    136,683.80x = 24,788,036,043.42
  5. Step 5: Solve for x
    x = 24,788,036,043.42/136,683.80
  6. Step 6: Final answer
    x = 181,353.14

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1.5x scale

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.