Home / 139,644.22-192,708.78-75,981.67

Finding the Fourth Proportional to 139,644.22, 192,708.78 and 75,981.67

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Solution

The fourth proportional to 139,644.22, 192,708.78 and 75,981.67 is: 104,854.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,644.22 : 192,708.78 = 75,981.67 : x
  2. Step 2: Convert to fraction form
    139,644.22/192,708.78 = 75,981.67/x
  3. Step 3: Cross multiply
    139,644.22x = 192,708.78 × 75,981.67
  4. Step 4: Simplify right side
    139,644.22x = 14,642,334,928.06
  5. Step 5: Solve for x
    x = 14,642,334,928.06/139,644.22
  6. Step 6: Final answer
    x = 104,854.57

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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.