Home / 285,434.40-428,150.34-72,204.30

Finding the Fourth Proportional to 285,434.40, 428,150.34 and 72,204.30

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Solution

The fourth proportional to 285,434.40, 428,150.34 and 72,204.30 is: 108,306.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,434.40 : 428,150.34 = 72,204.30 : x
  2. Step 2: Convert to fraction form
    285,434.40/428,150.34 = 72,204.30/x
  3. Step 3: Cross multiply
    285,434.40x = 428,150.34 × 72,204.30
  4. Step 4: Simplify right side
    285,434.40x = 30,914,295,594.46
  5. Step 5: Solve for x
    x = 30,914,295,594.46/285,434.40
  6. Step 6: Final answer
    x = 108,306.13

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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.