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Finding the Fourth Proportional to 171,657.39, 257,435.69 and 66,451.23

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Solution

The fourth proportional to 171,657.39, 257,435.69 and 66,451.23 is: 99,657.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,657.39 : 257,435.69 = 66,451.23 : x
  2. Step 2: Convert to fraction form
    171,657.39/257,435.69 = 66,451.23/x
  3. Step 3: Cross multiply
    171,657.39x = 257,435.69 × 66,451.23
  4. Step 4: Simplify right side
    171,657.39x = 17,106,917,914.14
  5. Step 5: Solve for x
    x = 17,106,917,914.14/171,657.39
  6. Step 6: Final answer
    x = 99,657.33

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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.