Home / 139,319.28-192,272.58-78,900.57

Finding the Fourth Proportional to 139,319.28, 192,272.58 and 78,900.57

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Solution

The fourth proportional to 139,319.28, 192,272.58 and 78,900.57 is: 108,889.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,319.28 : 192,272.58 = 78,900.57 : x
  2. Step 2: Convert to fraction form
    139,319.28/192,272.58 = 78,900.57/x
  3. Step 3: Cross multiply
    139,319.28x = 192,272.58 × 78,900.57
  4. Step 4: Simplify right side
    139,319.28x = 15,170,416,157.37
  5. Step 5: Solve for x
    x = 15,170,416,157.37/139,319.28
  6. Step 6: Final answer
    x = 108,889.57

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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.