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Finding the Fourth Proportional to 266,970.28, 400,455.30 and 79,981.78

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Solution

The fourth proportional to 266,970.28, 400,455.30 and 79,981.78 is: 119,972.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,970.28 : 400,455.30 = 79,981.78 : x
  2. Step 2: Convert to fraction form
    266,970.28/400,455.30 = 79,981.78/x
  3. Step 3: Cross multiply
    266,970.28x = 400,455.30 × 79,981.78
  4. Step 4: Simplify right side
    266,970.28x = 32,029,127,704.43
  5. Step 5: Solve for x
    x = 32,029,127,704.43/266,970.28
  6. Step 6: Final answer
    x = 119,972.63

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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.