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Finding the Fourth Proportional to 66,388.12, 99,600.66 and 28,951.51

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Solution

The fourth proportional to 66,388.12, 99,600.66 and 28,951.51 is: 43,435.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,388.12 : 99,600.66 = 28,951.51 : x
  2. Step 2: Convert to fraction form
    66,388.12/99,600.66 = 28,951.51/x
  3. Step 3: Cross multiply
    66,388.12x = 99,600.66 × 28,951.51
  4. Step 4: Simplify right side
    66,388.12x = 2,883,589,504.00
  5. Step 5: Solve for x
    x = 2,883,589,504.00/66,388.12
  6. Step 6: Final answer
    x = 43,435.32

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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.