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Finding the Fourth Proportional to 169,994.60, 254,991.90 and 81,421.10

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Solution

The fourth proportional to 169,994.60, 254,991.90 and 81,421.10 is: 122,131.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,994.60 : 254,991.90 = 81,421.10 : x
  2. Step 2: Convert to fraction form
    169,994.60/254,991.90 = 81,421.10/x
  3. Step 3: Cross multiply
    169,994.60x = 254,991.90 × 81,421.10
  4. Step 4: Simplify right side
    169,994.60x = 20,761,720,989.09
  5. Step 5: Solve for x
    x = 20,761,720,989.09/169,994.60
  6. Step 6: Final answer
    x = 122,131.65

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1.5x scale

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.