Home / 285,440.24-428,049.80-85,713.52

Finding the Fourth Proportional to 285,440.24, 428,049.80 and 85,713.52

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Solution

The fourth proportional to 285,440.24, 428,049.80 and 85,713.52 is: 128,537.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,440.24 : 428,049.80 = 85,713.52 : x
  2. Step 2: Convert to fraction form
    285,440.24/428,049.80 = 85,713.52/x
  3. Step 3: Cross multiply
    285,440.24x = 428,049.80 × 85,713.52
  4. Step 4: Simplify right side
    285,440.24x = 36,689,655,093.30
  5. Step 5: Solve for x
    x = 36,689,655,093.30/285,440.24
  6. Step 6: Final answer
    x = 128,537.08

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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.