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Finding the Fourth Proportional to 251,368.72, 376,934.31 and 91,333.09

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Solution

The fourth proportional to 251,368.72, 376,934.31 and 91,333.09 is: 136,956.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,368.72 : 376,934.31 = 91,333.09 : x
  2. Step 2: Convert to fraction form
    251,368.72/376,934.31 = 91,333.09/x
  3. Step 3: Cross multiply
    251,368.72x = 376,934.31 × 91,333.09
  4. Step 4: Simplify right side
    251,368.72x = 34,426,576,790.61
  5. Step 5: Solve for x
    x = 34,426,576,790.61/251,368.72
  6. Step 6: Final answer
    x = 136,956.49

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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.