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Finding the Fourth Proportional to 279,900.90, 419,851.35 and 92,912.40

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Solution

The fourth proportional to 279,900.90, 419,851.35 and 92,912.40 is: 139,368.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,900.90 : 419,851.35 = 92,912.40 : x
  2. Step 2: Convert to fraction form
    279,900.90/419,851.35 = 92,912.40/x
  3. Step 3: Cross multiply
    279,900.90x = 419,851.35 × 92,912.40
  4. Step 4: Simplify right side
    279,900.90x = 39,009,396,571.74
  5. Step 5: Solve for x
    x = 39,009,396,571.74/279,900.90
  6. Step 6: Final answer
    x = 139,368.60

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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.