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Finding the Fourth Proportional to 260,211, 359,091.18 and 140,979

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Solution

The fourth proportional to 260,211, 359,091.18 and 140,979 is: 194,551.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,211 : 359,091.18 = 140,979 : x
  2. Step 2: Convert to fraction form
    260,211/359,091.18 = 140,979/x
  3. Step 3: Cross multiply
    260,211x = 359,091.18 × 140,979
  4. Step 4: Simplify right side
    260,211x = 50,624,315,465.22
  5. Step 5: Solve for x
    x = 50,624,315,465.22/260,211
  6. Step 6: Final answer
    x = 194,551.02

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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.