Home / 285,981.24-428,974.31-72,749.34

Finding the Fourth Proportional to 285,981.24, 428,974.31 and 72,749.34

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Solution

The fourth proportional to 285,981.24, 428,974.31 and 72,749.34 is: 109,124.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,981.24 : 428,974.31 = 72,749.34 : x
  2. Step 2: Convert to fraction form
    285,981.24/428,974.31 = 72,749.34/x
  3. Step 3: Cross multiply
    285,981.24x = 428,974.31 × 72,749.34
  4. Step 4: Simplify right side
    285,981.24x = 31,207,597,929.46
  5. Step 5: Solve for x
    x = 31,207,597,929.46/285,981.24
  6. Step 6: Final answer
    x = 109,124.63

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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.