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Finding the Fourth Proportional to 139,675.50, 192,718.58 and 82,317.11

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Solution

The fourth proportional to 139,675.50, 192,718.58 and 82,317.11 is: 113,577.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,675.50 : 192,718.58 = 82,317.11 : x
  2. Step 2: Convert to fraction form
    139,675.50/192,718.58 = 82,317.11/x
  3. Step 3: Cross multiply
    139,675.50x = 192,718.58 × 82,317.11
  4. Step 4: Simplify right side
    139,675.50x = 15,864,035,173.73
  5. Step 5: Solve for x
    x = 15,864,035,173.73/139,675.50
  6. Step 6: Final answer
    x = 113,577.79

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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.