Home / 285,545.90-428,319.82-72,313.73

Finding the Fourth Proportional to 285,545.90, 428,319.82 and 72,313.73

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Solution

The fourth proportional to 285,545.90, 428,319.82 and 72,313.73 is: 108,470.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,545.90 : 428,319.82 = 72,313.73 : x
  2. Step 2: Convert to fraction form
    285,545.90/428,319.82 = 72,313.73/x
  3. Step 3: Cross multiply
    285,545.90x = 428,319.82 × 72,313.73
  4. Step 4: Simplify right side
    285,545.90x = 30,973,403,817.13
  5. Step 5: Solve for x
    x = 30,973,403,817.13/285,545.90
  6. Step 6: Final answer
    x = 108,470.84

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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.