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Finding the Fourth Proportional to 157,625.56, 217,491.42 and 100,287.64

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Solution

The fourth proportional to 157,625.56, 217,491.42 and 100,287.64 is: 138,376.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,625.56 : 217,491.42 = 100,287.64 : x
  2. Step 2: Convert to fraction form
    157,625.56/217,491.42 = 100,287.64/x
  3. Step 3: Cross multiply
    157,625.56x = 217,491.42 × 100,287.64
  4. Step 4: Simplify right side
    157,625.56x = 21,811,701,232.05
  5. Step 5: Solve for x
    x = 21,811,701,232.05/157,625.56
  6. Step 6: Final answer
    x = 138,376.68

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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.