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Finding the Fourth Proportional to 84,435.77, 126,621.85 and 34,489.16

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Solution

The fourth proportional to 84,435.77, 126,621.85 and 34,489.16 is: 51,720.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,435.77 : 126,621.85 = 34,489.16 : x
  2. Step 2: Convert to fraction form
    84,435.77/126,621.85 = 34,489.16/x
  3. Step 3: Cross multiply
    84,435.77x = 126,621.85 × 34,489.16
  4. Step 4: Simplify right side
    84,435.77x = 4,367,081,064.31
  5. Step 5: Solve for x
    x = 4,367,081,064.31/84,435.77
  6. Step 6: Final answer
    x = 51,720.75

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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.