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Finding the Fourth Proportional to 285,425.52, 428,121.80 and 85,741.52

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Solution

The fourth proportional to 285,425.52, 428,121.80 and 85,741.52 is: 128,607.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,425.52 : 428,121.80 = 85,741.52 : x
  2. Step 2: Convert to fraction form
    285,425.52/428,121.80 = 85,741.52/x
  3. Step 3: Cross multiply
    285,425.52x = 428,121.80 × 85,741.52
  4. Step 4: Simplify right side
    285,425.52x = 36,707,813,877.14
  5. Step 5: Solve for x
    x = 36,707,813,877.14/285,425.52
  6. Step 6: Final answer
    x = 128,607.33

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.