Home / 78,519.35-108,358.49-42,711.28

Finding the Fourth Proportional to 78,519.35, 108,358.49 and 42,711.28

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Solution

The fourth proportional to 78,519.35, 108,358.49 and 42,711.28 is: 58,942.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,519.35 : 108,358.49 = 42,711.28 : x
  2. Step 2: Convert to fraction form
    78,519.35/108,358.49 = 42,711.28/x
  3. Step 3: Cross multiply
    78,519.35x = 108,358.49 × 42,711.28
  4. Step 4: Simplify right side
    78,519.35x = 4,628,129,806.77
  5. Step 5: Solve for x
    x = 4,628,129,806.77/78,519.35
  6. Step 6: Final answer
    x = 58,942.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.