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Finding the Fourth Proportional to 269,274.20, 403,911.30 and 91,981.40

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Solution

The fourth proportional to 269,274.20, 403,911.30 and 91,981.40 is: 137,972.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,274.20 : 403,911.30 = 91,981.40 : x
  2. Step 2: Convert to fraction form
    269,274.20/403,911.30 = 91,981.40/x
  3. Step 3: Cross multiply
    269,274.20x = 403,911.30 × 91,981.40
  4. Step 4: Simplify right side
    269,274.20x = 37,152,326,849.82
  5. Step 5: Solve for x
    x = 37,152,326,849.82/269,274.20
  6. Step 6: Final answer
    x = 137,972.10

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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.