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Finding the Fourth Proportional to 139,568.32, 209,621.10 and 119,622.88

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Solution

The fourth proportional to 139,568.32, 209,621.10 and 119,622.88 is: 179,664.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,568.32 : 209,621.10 = 119,622.88 : x
  2. Step 2: Convert to fraction form
    139,568.32/209,621.10 = 119,622.88/x
  3. Step 3: Cross multiply
    139,568.32x = 209,621.10 × 119,622.88
  4. Step 4: Simplify right side
    139,568.32x = 25,075,479,690.77
  5. Step 5: Solve for x
    x = 25,075,479,690.77/139,568.32
  6. Step 6: Final answer
    x = 179,664.55

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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.