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Finding the Fourth Proportional to 85,892.65, 128,889.23 and 35,968.56

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Solution

The fourth proportional to 85,892.65, 128,889.23 and 35,968.56 is: 53,973.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,892.65 : 128,889.23 = 35,968.56 : x
  2. Step 2: Convert to fraction form
    85,892.65/128,889.23 = 35,968.56/x
  3. Step 3: Cross multiply
    85,892.65x = 128,889.23 × 35,968.56
  4. Step 4: Simplify right side
    85,892.65x = 4,635,959,339.43
  5. Step 5: Solve for x
    x = 4,635,959,339.43/85,892.65
  6. Step 6: Final answer
    x = 53,973.88

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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.