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Finding the Fourth Proportional to 66,392.80, 99,704.40 and 35,288.80

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Solution

The fourth proportional to 66,392.80, 99,704.40 and 35,288.80 is: 52,994.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,392.80 : 99,704.40 = 35,288.80 : x
  2. Step 2: Convert to fraction form
    66,392.80/99,704.40 = 35,288.80/x
  3. Step 3: Cross multiply
    66,392.80x = 99,704.40 × 35,288.80
  4. Step 4: Simplify right side
    66,392.80x = 3,518,448,630.72
  5. Step 5: Solve for x
    x = 3,518,448,630.72/66,392.80
  6. Step 6: Final answer
    x = 52,994.43

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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.