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Finding the Fourth Proportional to 76,279.60, 114,419.40 and 20,119.60

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Solution

The fourth proportional to 76,279.60, 114,419.40 and 20,119.60 is: 30,179.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,279.60 : 114,419.40 = 20,119.60 : x
  2. Step 2: Convert to fraction form
    76,279.60/114,419.40 = 20,119.60/x
  3. Step 3: Cross multiply
    76,279.60x = 114,419.40 × 20,119.60
  4. Step 4: Simplify right side
    76,279.60x = 2,302,072,560.24
  5. Step 5: Solve for x
    x = 2,302,072,560.24/76,279.60
  6. Step 6: Final answer
    x = 30,179.40

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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.