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Finding the Fourth Proportional to 85,449.74, 128,091.29 and 34,143.11

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Solution

The fourth proportional to 85,449.74, 128,091.29 and 34,143.11 is: 51,181.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,449.74 : 128,091.29 = 34,143.11 : x
  2. Step 2: Convert to fraction form
    85,449.74/128,091.29 = 34,143.11/x
  3. Step 3: Cross multiply
    85,449.74x = 128,091.29 × 34,143.11
  4. Step 4: Simplify right side
    85,449.74x = 4,373,435,004.51
  5. Step 5: Solve for x
    x = 4,373,435,004.51/85,449.74
  6. Step 6: Final answer
    x = 51,181.38

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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.