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Finding the Fourth Proportional to 79,577.32, 119,357.08 and 20,414.40

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Solution

The fourth proportional to 79,577.32, 119,357.08 and 20,414.40 is: 30,619.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,577.32 : 119,357.08 = 20,414.40 : x
  2. Step 2: Convert to fraction form
    79,577.32/119,357.08 = 20,414.40/x
  3. Step 3: Cross multiply
    79,577.32x = 119,357.08 × 20,414.40
  4. Step 4: Simplify right side
    79,577.32x = 2,436,603,173.95
  5. Step 5: Solve for x
    x = 2,436,603,173.95/79,577.32
  6. Step 6: Final answer
    x = 30,619.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.