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Finding the Fourth Proportional to 85,080.99, 117,418.56 and 49,271.64

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Solution

The fourth proportional to 85,080.99, 117,418.56 and 49,271.64 is: 67,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,080.99 : 117,418.56 = 49,271.64 : x
  2. Step 2: Convert to fraction form
    85,080.99/117,418.56 = 49,271.64/x
  3. Step 3: Cross multiply
    85,080.99x = 117,418.56 × 49,271.64
  4. Step 4: Simplify right side
    85,080.99x = 5,785,405,017.64
  5. Step 5: Solve for x
    x = 5,785,405,017.64/85,080.99
  6. Step 6: Final answer
    x = 67,998.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.