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Finding the Fourth Proportional to 85,344.64, 117,747.50 and 55,147.74

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Solution

The fourth proportional to 85,344.64, 117,747.50 and 55,147.74 is: 76,085.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,344.64 : 117,747.50 = 55,147.74 : x
  2. Step 2: Convert to fraction form
    85,344.64/117,747.50 = 55,147.74/x
  3. Step 3: Cross multiply
    85,344.64x = 117,747.50 × 55,147.74
  4. Step 4: Simplify right side
    85,344.64x = 6,493,508,515.65
  5. Step 5: Solve for x
    x = 6,493,508,515.65/85,344.64
  6. Step 6: Final answer
    x = 76,085.72

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1.5x scale

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.