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Finding the Fourth Proportional to 139,615.53, 192,673.76 and 79,188.63

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Solution

The fourth proportional to 139,615.53, 192,673.76 and 79,188.63 is: 109,282.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,615.53 : 192,673.76 = 79,188.63 : x
  2. Step 2: Convert to fraction form
    139,615.53/192,673.76 = 79,188.63/x
  3. Step 3: Cross multiply
    139,615.53x = 192,673.76 × 79,188.63
  4. Step 4: Simplify right side
    139,615.53x = 15,257,571,091.35
  5. Step 5: Solve for x
    x = 15,257,571,091.35/139,615.53
  6. Step 6: Final answer
    x = 109,282.76

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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.