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Finding the Fourth Proportional to 61,751.64, 85,265.25 and 47,388.72

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Solution

The fourth proportional to 61,751.64, 85,265.25 and 47,388.72 is: 65,433.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,751.64 : 85,265.25 = 47,388.72 : x
  2. Step 2: Convert to fraction form
    61,751.64/85,265.25 = 47,388.72/x
  3. Step 3: Cross multiply
    61,751.64x = 85,265.25 × 47,388.72
  4. Step 4: Simplify right side
    61,751.64x = 4,040,611,057.98
  5. Step 5: Solve for x
    x = 4,040,611,057.98/61,751.64
  6. Step 6: Final answer
    x = 65,433.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.