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Finding the Fourth Proportional to 143,391.60, 197,879.22 and 79,728.84

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Solution

The fourth proportional to 143,391.60, 197,879.22 and 79,728.84 is: 110,025.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,391.60 : 197,879.22 = 79,728.84 : x
  2. Step 2: Convert to fraction form
    143,391.60/197,879.22 = 79,728.84/x
  3. Step 3: Cross multiply
    143,391.60x = 197,879.22 × 79,728.84
  4. Step 4: Simplify right side
    143,391.60x = 15,776,680,670.70
  5. Step 5: Solve for x
    x = 15,776,680,670.70/143,391.60
  6. Step 6: Final answer
    x = 110,025.14

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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.