Home / 285,811.38-428,717.22-72,595.28

Finding the Fourth Proportional to 285,811.38, 428,717.22 and 72,595.28

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Solution

The fourth proportional to 285,811.38, 428,717.22 and 72,595.28 is: 108,892.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,811.38 : 428,717.22 = 72,595.28 : x
  2. Step 2: Convert to fraction form
    285,811.38/428,717.22 = 72,595.28/x
  3. Step 3: Cross multiply
    285,811.38x = 428,717.22 × 72,595.28
  4. Step 4: Simplify right side
    285,811.38x = 31,122,844,483.14
  5. Step 5: Solve for x
    x = 31,122,844,483.14/285,811.38
  6. Step 6: Final answer
    x = 108,892.95

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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.