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Finding the Fourth Proportional to 66,512.80, 91,784.80 and 36,297.36

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Solution

The fourth proportional to 66,512.80, 91,784.80 and 36,297.36 is: 50,088.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,512.80 : 91,784.80 = 36,297.36 : x
  2. Step 2: Convert to fraction form
    66,512.80/91,784.80 = 36,297.36/x
  3. Step 3: Cross multiply
    66,512.80x = 91,784.80 × 36,297.36
  4. Step 4: Simplify right side
    66,512.80x = 3,331,545,928.13
  5. Step 5: Solve for x
    x = 3,331,545,928.13/66,512.80
  6. Step 6: Final answer
    x = 50,088.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.