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Finding the Fourth Proportional to 254,171.98, 380,991.93 and 85,634.07

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Solution

The fourth proportional to 254,171.98, 380,991.93 and 85,634.07 is: 128,361.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,171.98 : 380,991.93 = 85,634.07 : x
  2. Step 2: Convert to fraction form
    254,171.98/380,991.93 = 85,634.07/x
  3. Step 3: Cross multiply
    254,171.98x = 380,991.93 × 85,634.07
  4. Step 4: Simplify right side
    254,171.98x = 32,625,889,603.06
  5. Step 5: Solve for x
    x = 32,625,889,603.06/254,171.98
  6. Step 6: Final answer
    x = 128,361.47

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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.