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Finding the Fourth Proportional to 276,858, 415,356.36 and 79,866

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Solution

The fourth proportional to 276,858, 415,356.36 and 79,866 is: 119,819.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,858 : 415,356.36 = 79,866 : x
  2. Step 2: Convert to fraction form
    276,858/415,356.36 = 79,866/x
  3. Step 3: Cross multiply
    276,858x = 415,356.36 × 79,866
  4. Step 4: Simplify right side
    276,858x = 33,172,851,047.76
  5. Step 5: Solve for x
    x = 33,172,851,047.76/276,858
  6. Step 6: Final answer
    x = 119,819.01

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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.