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Finding the Fourth Proportional to 268,672.83, 402,994.67 and 81,669.75

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Solution

The fourth proportional to 268,672.83, 402,994.67 and 81,669.75 is: 122,500.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,672.83 : 402,994.67 = 81,669.75 : x
  2. Step 2: Convert to fraction form
    268,672.83/402,994.67 = 81,669.75/x
  3. Step 3: Cross multiply
    268,672.83x = 402,994.67 × 81,669.75
  4. Step 4: Simplify right side
    268,672.83x = 32,912,473,541.88
  5. Step 5: Solve for x
    x = 32,912,473,541.88/268,672.83
  6. Step 6: Final answer
    x = 122,500.19

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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.