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Finding the Fourth Proportional to 85,767.63, 128,663.91 and 26,608.02

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Solution

The fourth proportional to 85,767.63, 128,663.91 and 26,608.02 is: 39,915.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,767.63 : 128,663.91 = 26,608.02 : x
  2. Step 2: Convert to fraction form
    85,767.63/128,663.91 = 26,608.02/x
  3. Step 3: Cross multiply
    85,767.63x = 128,663.91 × 26,608.02
  4. Step 4: Simplify right side
    85,767.63x = 3,423,491,890.56
  5. Step 5: Solve for x
    x = 3,423,491,890.56/85,767.63
  6. Step 6: Final answer
    x = 39,915.90

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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.