Home / 128,319.70-192,479.64-69,183.22

Finding the Fourth Proportional to 128,319.70, 192,479.64 and 69,183.22

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Solution

The fourth proportional to 128,319.70, 192,479.64 and 69,183.22 is: 103,774.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,319.70 : 192,479.64 = 69,183.22 : x
  2. Step 2: Convert to fraction form
    128,319.70/192,479.64 = 69,183.22/x
  3. Step 3: Cross multiply
    128,319.70x = 192,479.64 × 69,183.22
  4. Step 4: Simplify right side
    128,319.70x = 13,316,361,279.64
  5. Step 5: Solve for x
    x = 13,316,361,279.64/128,319.70
  6. Step 6: Final answer
    x = 103,774.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.