Home / 285,949.79-428,927.76-86,271.92

Finding the Fourth Proportional to 285,949.79, 428,927.76 and 86,271.92

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Solution

The fourth proportional to 285,949.79, 428,927.76 and 86,271.92 is: 129,408.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,949.79 : 428,927.76 = 86,271.92 : x
  2. Step 2: Convert to fraction form
    285,949.79/428,927.76 = 86,271.92/x
  3. Step 3: Cross multiply
    285,949.79x = 428,927.76 × 86,271.92
  4. Step 4: Simplify right side
    285,949.79x = 37,004,419,251.86
  5. Step 5: Solve for x
    x = 37,004,419,251.86/285,949.79
  6. Step 6: Final answer
    x = 129,408.80

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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.