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Finding the Fourth Proportional to 171,933.60, 257,994.54 and 66,756.72

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Solution

The fourth proportional to 171,933.60, 257,994.54 and 66,756.72 is: 100,171.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,933.60 : 257,994.54 = 66,756.72 : x
  2. Step 2: Convert to fraction form
    171,933.60/257,994.54 = 66,756.72/x
  3. Step 3: Cross multiply
    171,933.60x = 257,994.54 × 66,756.72
  4. Step 4: Simplify right side
    171,933.60x = 17,222,869,268.31
  5. Step 5: Solve for x
    x = 17,222,869,268.31/171,933.60
  6. Step 6: Final answer
    x = 100,171.63

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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.