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Finding the Fourth Proportional to 120,073.08, 165,700.08 and 66,361.20

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Solution

The fourth proportional to 120,073.08, 165,700.08 and 66,361.20 is: 91,578.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,073.08 : 165,700.08 = 66,361.20 : x
  2. Step 2: Convert to fraction form
    120,073.08/165,700.08 = 66,361.20/x
  3. Step 3: Cross multiply
    120,073.08x = 165,700.08 × 66,361.20
  4. Step 4: Simplify right side
    120,073.08x = 10,996,056,148.90
  5. Step 5: Solve for x
    x = 10,996,056,148.90/120,073.08
  6. Step 6: Final answer
    x = 91,578.03

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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.