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Finding the Fourth Proportional to 271,978.96, 407,968.38 and 84,990.46

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Solution

The fourth proportional to 271,978.96, 407,968.38 and 84,990.46 is: 127,485.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,978.96 : 407,968.38 = 84,990.46 : x
  2. Step 2: Convert to fraction form
    271,978.96/407,968.38 = 84,990.46/x
  3. Step 3: Cross multiply
    271,978.96x = 407,968.38 × 84,990.46
  4. Step 4: Simplify right side
    271,978.96x = 34,673,420,281.65
  5. Step 5: Solve for x
    x = 34,673,420,281.65/271,978.96
  6. Step 6: Final answer
    x = 127,485.67

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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.