Home / 285,439.24-428,048.30-85,712.52

Finding the Fourth Proportional to 285,439.24, 428,048.30 and 85,712.52

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Solution

The fourth proportional to 285,439.24, 428,048.30 and 85,712.52 is: 128,535.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,439.24 : 428,048.30 = 85,712.52 : x
  2. Step 2: Convert to fraction form
    285,439.24/428,048.30 = 85,712.52/x
  3. Step 3: Cross multiply
    285,439.24x = 428,048.30 × 85,712.52
  4. Step 4: Simplify right side
    285,439.24x = 36,689,098,474.72
  5. Step 5: Solve for x
    x = 36,689,098,474.72/285,439.24
  6. Step 6: Final answer
    x = 128,535.58

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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.