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Finding the Fourth Proportional to 84,080.64, 115,910.73 and 66,144.51

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Solution

The fourth proportional to 84,080.64, 115,910.73 and 66,144.51 is: 91,184.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,080.64 : 115,910.73 = 66,144.51 : x
  2. Step 2: Convert to fraction form
    84,080.64/115,910.73 = 66,144.51/x
  3. Step 3: Cross multiply
    84,080.64x = 115,910.73 × 66,144.51
  4. Step 4: Simplify right side
    84,080.64x = 7,666,858,439.59
  5. Step 5: Solve for x
    x = 7,666,858,439.59/84,080.64
  6. Step 6: Final answer
    x = 91,184.58

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1.5x scale

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.