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Finding the Fourth Proportional to 66,722.51, 100,094.70 and 31,643.03

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Solution

The fourth proportional to 66,722.51, 100,094.70 and 31,643.03 is: 47,469.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,722.51 : 100,094.70 = 31,643.03 : x
  2. Step 2: Convert to fraction form
    66,722.51/100,094.70 = 31,643.03/x
  3. Step 3: Cross multiply
    66,722.51x = 100,094.70 × 31,643.03
  4. Step 4: Simplify right side
    66,722.51x = 3,167,299,594.94
  5. Step 5: Solve for x
    x = 3,167,299,594.94/66,722.51
  6. Step 6: Final answer
    x = 47,469.73

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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.