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Finding the Fourth Proportional to 80,518.60, 120,798.78 and 30,599.56

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Solution

The fourth proportional to 80,518.60, 120,798.78 and 30,599.56 is: 45,907.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,518.60 : 120,798.78 = 30,599.56 : x
  2. Step 2: Convert to fraction form
    80,518.60/120,798.78 = 30,599.56/x
  3. Step 3: Cross multiply
    80,518.60x = 120,798.78 × 30,599.56
  4. Step 4: Simplify right side
    80,518.60x = 3,696,389,516.54
  5. Step 5: Solve for x
    x = 3,696,389,516.54/80,518.60
  6. Step 6: Final answer
    x = 45,907.28

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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.