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Finding the Fourth Proportional to 85,085.76, 117,425.28 and 47,360.64

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Solution

The fourth proportional to 85,085.76, 117,425.28 and 47,360.64 is: 65,361.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,085.76 : 117,425.28 = 47,360.64 : x
  2. Step 2: Convert to fraction form
    85,085.76/117,425.28 = 47,360.64/x
  3. Step 3: Cross multiply
    85,085.76x = 117,425.28 × 47,360.64
  4. Step 4: Simplify right side
    85,085.76x = 5,561,336,412.98
  5. Step 5: Solve for x
    x = 5,561,336,412.98/85,085.76
  6. Step 6: Final answer
    x = 65,361.54

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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.