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Finding the Fourth Proportional to 85,908.15, 128,831.33 and 29,733

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Solution

The fourth proportional to 85,908.15, 128,831.33 and 29,733 is: 44,588.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,908.15 : 128,831.33 = 29,733 : x
  2. Step 2: Convert to fraction form
    85,908.15/128,831.33 = 29,733/x
  3. Step 3: Cross multiply
    85,908.15x = 128,831.33 × 29,733
  4. Step 4: Simplify right side
    85,908.15x = 3,830,541,786.23
  5. Step 5: Solve for x
    x = 3,830,541,786.23/85,908.15
  6. Step 6: Final answer
    x = 44,588.81

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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.