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Finding the Fourth Proportional to 66,608.72, 99,904.44 and 31,570.64

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Solution

The fourth proportional to 66,608.72, 99,904.44 and 31,570.64 is: 47,351.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,608.72 : 99,904.44 = 31,570.64 : x
  2. Step 2: Convert to fraction form
    66,608.72/99,904.44 = 31,570.64/x
  3. Step 3: Cross multiply
    66,608.72x = 99,904.44 × 31,570.64
  4. Step 4: Simplify right side
    66,608.72x = 3,154,047,109.64
  5. Step 5: Solve for x
    x = 3,154,047,109.64/66,608.72
  6. Step 6: Final answer
    x = 47,351.86

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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.