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Finding the Fourth Proportional to 84,899.61, 127,333.08 and 80,684.91

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Solution

The fourth proportional to 84,899.61, 127,333.08 and 80,684.91 is: 121,011.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,899.61 : 127,333.08 = 80,684.91 : x
  2. Step 2: Convert to fraction form
    84,899.61/127,333.08 = 80,684.91/x
  3. Step 3: Cross multiply
    84,899.61x = 127,333.08 × 80,684.91
  4. Step 4: Simplify right side
    84,899.61x = 10,273,858,099.82
  5. Step 5: Solve for x
    x = 10,273,858,099.82/84,899.61
  6. Step 6: Final answer
    x = 121,011.84

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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.