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Finding the Fourth Proportional to 85,257.64, 127,965.24 and 43,167.28

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Solution

The fourth proportional to 85,257.64, 127,965.24 and 43,167.28 is: 64,790.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,257.64 : 127,965.24 = 43,167.28 : x
  2. Step 2: Convert to fraction form
    85,257.64/127,965.24 = 43,167.28/x
  3. Step 3: Cross multiply
    85,257.64x = 127,965.24 × 43,167.28
  4. Step 4: Simplify right side
    85,257.64x = 5,523,911,345.35
  5. Step 5: Solve for x
    x = 5,523,911,345.35/85,257.64
  6. Step 6: Final answer
    x = 64,790.81

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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.