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Finding the Fourth Proportional to 251,143.40, 376,715.10 and 144,855.20

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Solution

The fourth proportional to 251,143.40, 376,715.10 and 144,855.20 is: 217,282.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,143.40 : 376,715.10 = 144,855.20 : x
  2. Step 2: Convert to fraction form
    251,143.40/376,715.10 = 144,855.20/x
  3. Step 3: Cross multiply
    251,143.40x = 376,715.10 × 144,855.20
  4. Step 4: Simplify right side
    251,143.40x = 54,569,141,153.52
  5. Step 5: Solve for x
    x = 54,569,141,153.52/251,143.40
  6. Step 6: Final answer
    x = 217,282.80

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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.