Home / 280,340.76-420,261.06-102,806.28

Finding the Fourth Proportional to 280,340.76, 420,261.06 and 102,806.28

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Solution

The fourth proportional to 280,340.76, 420,261.06 and 102,806.28 is: 154,117.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,340.76 : 420,261.06 = 102,806.28 : x
  2. Step 2: Convert to fraction form
    280,340.76/420,261.06 = 102,806.28/x
  3. Step 3: Cross multiply
    280,340.76x = 420,261.06 × 102,806.28
  4. Step 4: Simplify right side
    280,340.76x = 43,205,476,207.46
  5. Step 5: Solve for x
    x = 43,205,476,207.46/280,340.76
  6. Step 6: Final answer
    x = 154,117.71

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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.