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Finding the Fourth Proportional to 136,030.40, 203,846.40 and 121,990.40

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Solution

The fourth proportional to 136,030.40, 203,846.40 and 121,990.40 is: 182,806.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,030.40 : 203,846.40 = 121,990.40 : x
  2. Step 2: Convert to fraction form
    136,030.40/203,846.40 = 121,990.40/x
  3. Step 3: Cross multiply
    136,030.40x = 203,846.40 × 121,990.40
  4. Step 4: Simplify right side
    136,030.40x = 24,867,303,874.56
  5. Step 5: Solve for x
    x = 24,867,303,874.56/136,030.40
  6. Step 6: Final answer
    x = 182,806.96

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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.