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Finding the Fourth Proportional to 67,887.77, 101,831.64 and 21,144.29

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Solution

The fourth proportional to 67,887.77, 101,831.64 and 21,144.29 is: 31,716.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,887.77 : 101,831.64 = 21,144.29 : x
  2. Step 2: Convert to fraction form
    67,887.77/101,831.64 = 21,144.29/x
  3. Step 3: Cross multiply
    67,887.77x = 101,831.64 × 21,144.29
  4. Step 4: Simplify right side
    67,887.77x = 2,153,157,218.18
  5. Step 5: Solve for x
    x = 2,153,157,218.18/67,887.77
  6. Step 6: Final answer
    x = 31,716.43

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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.