Home / 285,939.08-428,911.70-86,261.20

Finding the Fourth Proportional to 285,939.08, 428,911.70 and 86,261.20

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Solution

The fourth proportional to 285,939.08, 428,911.70 and 86,261.20 is: 129,392.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,939.08 : 428,911.70 = 86,261.20 : x
  2. Step 2: Convert to fraction form
    285,939.08/428,911.70 = 86,261.20/x
  3. Step 3: Cross multiply
    285,939.08x = 428,911.70 × 86,261.20
  4. Step 4: Simplify right side
    285,939.08x = 36,998,437,936.04
  5. Step 5: Solve for x
    x = 36,998,437,936.04/285,939.08
  6. Step 6: Final answer
    x = 129,392.73

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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.