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Finding the Fourth Proportional to 139,529.80, 209,168.11 and 50,720.58

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Solution

The fourth proportional to 139,529.80, 209,168.11 and 50,720.58 is: 76,034.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,529.80 : 209,168.11 = 50,720.58 : x
  2. Step 2: Convert to fraction form
    139,529.80/209,168.11 = 50,720.58/x
  3. Step 3: Cross multiply
    139,529.80x = 209,168.11 × 50,720.58
  4. Step 4: Simplify right side
    139,529.80x = 10,609,127,856.70
  5. Step 5: Solve for x
    x = 10,609,127,856.70/139,529.80
  6. Step 6: Final answer
    x = 76,034.85

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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.