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Finding the Fourth Proportional to 120,197.62, 165,907.20 and 79,391.58

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Solution

The fourth proportional to 120,197.62, 165,907.20 and 79,391.58 is: 109,583.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,197.62 : 165,907.20 = 79,391.58 : x
  2. Step 2: Convert to fraction form
    120,197.62/165,907.20 = 79,391.58/x
  3. Step 3: Cross multiply
    120,197.62x = 165,907.20 × 79,391.58
  4. Step 4: Simplify right side
    120,197.62x = 13,171,634,741.38
  5. Step 5: Solve for x
    x = 13,171,634,741.38/120,197.62
  6. Step 6: Final answer
    x = 109,583.16

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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.