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Finding the Fourth Proportional to 171,453.28, 257,055.30 and 71,642.04

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Solution

The fourth proportional to 171,453.28, 257,055.30 and 71,642.04 is: 107,410.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,453.28 : 257,055.30 = 71,642.04 : x
  2. Step 2: Convert to fraction form
    171,453.28/257,055.30 = 71,642.04/x
  3. Step 3: Cross multiply
    171,453.28x = 257,055.30 × 71,642.04
  4. Step 4: Simplify right side
    171,453.28x = 18,415,966,084.81
  5. Step 5: Solve for x
    x = 18,415,966,084.81/171,453.28
  6. Step 6: Final answer
    x = 107,410.99

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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.