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Finding the Fourth Proportional to 386,861.44, 580,169.28 and 124,144

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Solution

The fourth proportional to 386,861.44, 580,169.28 and 124,144 is: 186,176.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,861.44 : 580,169.28 = 124,144 : x
  2. Step 2: Convert to fraction form
    386,861.44/580,169.28 = 124,144/x
  3. Step 3: Cross multiply
    386,861.44x = 580,169.28 × 124,144
  4. Step 4: Simplify right side
    386,861.44x = 72,024,535,096.32
  5. Step 5: Solve for x
    x = 72,024,535,096.32/386,861.44
  6. Step 6: Final answer
    x = 186,176.57

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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.