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Finding the Fourth Proportional to 171,791.04, 257,710.86 and 66,620.64

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Solution

The fourth proportional to 171,791.04, 257,710.86 and 66,620.64 is: 99,940.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,791.04 : 257,710.86 = 66,620.64 : x
  2. Step 2: Convert to fraction form
    171,791.04/257,710.86 = 66,620.64/x
  3. Step 3: Cross multiply
    171,791.04x = 257,710.86 × 66,620.64
  4. Step 4: Simplify right side
    171,791.04x = 17,168,862,428.15
  5. Step 5: Solve for x
    x = 17,168,862,428.15/171,791.04
  6. Step 6: Final answer
    x = 99,940.38

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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.