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Finding the Fourth Proportional to 120,080.43, 165,711.03 and 66,365.45

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Solution

The fourth proportional to 120,080.43, 165,711.03 and 66,365.45 is: 91,584.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,080.43 : 165,711.03 = 66,365.45 : x
  2. Step 2: Convert to fraction form
    120,080.43/165,711.03 = 66,365.45/x
  3. Step 3: Cross multiply
    120,080.43x = 165,711.03 × 66,365.45
  4. Step 4: Simplify right side
    120,080.43x = 10,997,487,075.91
  5. Step 5: Solve for x
    x = 10,997,487,075.91/120,080.43
  6. Step 6: Final answer
    x = 91,584.34

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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.