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Finding the Fourth Proportional to 136,005.40, 203,808.90 and 121,965.40

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Solution

The fourth proportional to 136,005.40, 203,808.90 and 121,965.40 is: 182,769.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,005.40 : 203,808.90 = 121,965.40 : x
  2. Step 2: Convert to fraction form
    136,005.40/203,808.90 = 121,965.40/x
  3. Step 3: Cross multiply
    136,005.40x = 203,808.90 × 121,965.40
  4. Step 4: Simplify right side
    136,005.40x = 24,857,634,012.06
  5. Step 5: Solve for x
    x = 24,857,634,012.06/136,005.40
  6. Step 6: Final answer
    x = 182,769.46

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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.