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Finding the Fourth Proportional to 85,019.73, 127,536.75 and 25,855.95

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Solution

The fourth proportional to 85,019.73, 127,536.75 and 25,855.95 is: 38,786.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,019.73 : 127,536.75 = 25,855.95 : x
  2. Step 2: Convert to fraction form
    85,019.73/127,536.75 = 25,855.95/x
  3. Step 3: Cross multiply
    85,019.73x = 127,536.75 × 25,855.95
  4. Step 4: Simplify right side
    85,019.73x = 3,297,583,831.16
  5. Step 5: Solve for x
    x = 3,297,583,831.16/85,019.73
  6. Step 6: Final answer
    x = 38,786.10

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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.