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Finding the Fourth Proportional to 85,993.44, 128,965.24 and 29,831.28

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Solution

The fourth proportional to 85,993.44, 128,965.24 and 29,831.28 is: 44,738.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,993.44 : 128,965.24 = 29,831.28 : x
  2. Step 2: Convert to fraction form
    85,993.44/128,965.24 = 29,831.28/x
  3. Step 3: Cross multiply
    85,993.44x = 128,965.24 × 29,831.28
  4. Step 4: Simplify right side
    85,993.44x = 3,847,198,184.71
  5. Step 5: Solve for x
    x = 3,847,198,184.71/85,993.44
  6. Step 6: Final answer
    x = 44,738.28

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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.