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Finding the Fourth Proportional to 85,275.72, 127,915.24 and 29,128.68

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Solution

The fourth proportional to 85,275.72, 127,915.24 and 29,128.68 is: 43,693.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,275.72 : 127,915.24 = 29,128.68 : x
  2. Step 2: Convert to fraction form
    85,275.72/127,915.24 = 29,128.68/x
  3. Step 3: Cross multiply
    85,275.72x = 127,915.24 × 29,128.68
  4. Step 4: Simplify right side
    85,275.72x = 3,726,002,093.08
  5. Step 5: Solve for x
    x = 3,726,002,093.08/85,275.72
  6. Step 6: Final answer
    x = 43,693.59

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1.5x scale

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.