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Finding the Fourth Proportional to 85,926.92, 128,873.69 and 43,220.97

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Solution

The fourth proportional to 85,926.92, 128,873.69 and 43,220.97 is: 64,823.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,926.92 : 128,873.69 = 43,220.97 : x
  2. Step 2: Convert to fraction form
    85,926.92/128,873.69 = 43,220.97/x
  3. Step 3: Cross multiply
    85,926.92x = 128,873.69 × 43,220.97
  4. Step 4: Simplify right side
    85,926.92x = 5,570,045,673.17
  5. Step 5: Solve for x
    x = 5,570,045,673.17/85,926.92
  6. Step 6: Final answer
    x = 64,823.06

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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.