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Finding the Fourth Proportional to 269,081.37, 403,424.40 and 128,938.41

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Solution

The fourth proportional to 269,081.37, 403,424.40 and 128,938.41 is: 193,312.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,081.37 : 403,424.40 = 128,938.41 : x
  2. Step 2: Convert to fraction form
    269,081.37/403,424.40 = 128,938.41/x
  3. Step 3: Cross multiply
    269,081.37x = 403,424.40 × 128,938.41
  4. Step 4: Simplify right side
    269,081.37x = 52,016,900,691.20
  5. Step 5: Solve for x
    x = 52,016,900,691.20/269,081.37
  6. Step 6: Final answer
    x = 193,312.90

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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.