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Finding the Fourth Proportional to 285,735.89, 428,561.71 and 75,388.61

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Solution

The fourth proportional to 285,735.89, 428,561.71 and 75,388.61 is: 113,071.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,735.89 : 428,561.71 = 75,388.61 : x
  2. Step 2: Convert to fraction form
    285,735.89/428,561.71 = 75,388.61/x
  3. Step 3: Cross multiply
    285,735.89x = 428,561.71 × 75,388.61
  4. Step 4: Simplify right side
    285,735.89x = 32,308,671,616.12
  5. Step 5: Solve for x
    x = 32,308,671,616.12/285,735.89
  6. Step 6: Final answer
    x = 113,071.80

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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.