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Finding the Fourth Proportional to 78,620.20, 117,924.90 and 25,311.40

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Solution

The fourth proportional to 78,620.20, 117,924.90 and 25,311.40 is: 37,965.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,620.20 : 117,924.90 = 25,311.40 : x
  2. Step 2: Convert to fraction form
    78,620.20/117,924.90 = 25,311.40/x
  3. Step 3: Cross multiply
    78,620.20x = 117,924.90 × 25,311.40
  4. Step 4: Simplify right side
    78,620.20x = 2,984,844,313.86
  5. Step 5: Solve for x
    x = 2,984,844,313.86/78,620.20
  6. Step 6: Final answer
    x = 37,965.36

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1.5x scale

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.