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Finding the Fourth Proportional to 66,753.32, 100,163.34 and 31,199.72

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Solution

The fourth proportional to 66,753.32, 100,163.34 and 31,199.72 is: 46,815.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,753.32 : 100,163.34 = 31,199.72 : x
  2. Step 2: Convert to fraction form
    66,753.32/100,163.34 = 31,199.72/x
  3. Step 3: Cross multiply
    66,753.32x = 100,163.34 × 31,199.72
  4. Step 4: Simplify right side
    66,753.32x = 3,125,068,162.26
  5. Step 5: Solve for x
    x = 3,125,068,162.26/66,753.32
  6. Step 6: Final answer
    x = 46,815.17

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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.