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Finding the Fourth Proportional to 84,812.64, 126,977.04 and 67,308

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Solution

The fourth proportional to 84,812.64, 126,977.04 and 67,308 is: 100,770.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,812.64 : 126,977.04 = 67,308 : x
  2. Step 2: Convert to fraction form
    84,812.64/126,977.04 = 67,308/x
  3. Step 3: Cross multiply
    84,812.64x = 126,977.04 × 67,308
  4. Step 4: Simplify right side
    84,812.64x = 8,546,570,608.32
  5. Step 5: Solve for x
    x = 8,546,570,608.32/84,812.64
  6. Step 6: Final answer
    x = 100,770.01

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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.