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Finding the Fourth Proportional to 149,054.01, 205,697.19 and 81,072.48

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Solution

The fourth proportional to 149,054.01, 205,697.19 and 81,072.48 is: 111,881.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,054.01 : 205,697.19 = 81,072.48 : x
  2. Step 2: Convert to fraction form
    149,054.01/205,697.19 = 81,072.48/x
  3. Step 3: Cross multiply
    149,054.01x = 205,697.19 × 81,072.48
  4. Step 4: Simplify right side
    149,054.01x = 16,676,381,322.33
  5. Step 5: Solve for x
    x = 16,676,381,322.33/149,054.01
  6. Step 6: Final answer
    x = 111,881.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.