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Finding the Fourth Proportional to 139,815.56, 192,950.28 and 79,384.20

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Solution

The fourth proportional to 139,815.56, 192,950.28 and 79,384.20 is: 109,552.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,815.56 : 192,950.28 = 79,384.20 : x
  2. Step 2: Convert to fraction form
    139,815.56/192,950.28 = 79,384.20/x
  3. Step 3: Cross multiply
    139,815.56x = 192,950.28 × 79,384.20
  4. Step 4: Simplify right side
    139,815.56x = 15,317,203,617.58
  5. Step 5: Solve for x
    x = 15,317,203,617.58/139,815.56
  6. Step 6: Final answer
    x = 109,552.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.