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Finding the Fourth Proportional to 66,504.80, 99,872.40 and 35,400.80

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Solution

The fourth proportional to 66,504.80, 99,872.40 and 35,400.80 is: 53,162.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,504.80 : 99,872.40 = 35,400.80 : x
  2. Step 2: Convert to fraction form
    66,504.80/99,872.40 = 35,400.80/x
  3. Step 3: Cross multiply
    66,504.80x = 99,872.40 × 35,400.80
  4. Step 4: Simplify right side
    66,504.80x = 3,535,562,857.92
  5. Step 5: Solve for x
    x = 3,535,562,857.92/66,504.80
  6. Step 6: Final answer
    x = 53,162.52

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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.