Home / 139,574.12-192,568.84-79,140

Finding the Fourth Proportional to 139,574.12, 192,568.84 and 79,140

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Solution

The fourth proportional to 139,574.12, 192,568.84 and 79,140 is: 109,188.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,574.12 : 192,568.84 = 79,140 : x
  2. Step 2: Convert to fraction form
    139,574.12/192,568.84 = 79,140/x
  3. Step 3: Cross multiply
    139,574.12x = 192,568.84 × 79,140
  4. Step 4: Simplify right side
    139,574.12x = 15,239,897,997.60
  5. Step 5: Solve for x
    x = 15,239,897,997.60/139,574.12
  6. Step 6: Final answer
    x = 109,188.57

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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.