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Finding the Fourth Proportional to 80,487.94, 111,009.97 and 71,299.32

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Solution

The fourth proportional to 80,487.94, 111,009.97 and 71,299.32 is: 98,336.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,487.94 : 111,009.97 = 71,299.32 : x
  2. Step 2: Convert to fraction form
    80,487.94/111,009.97 = 71,299.32/x
  3. Step 3: Cross multiply
    80,487.94x = 111,009.97 × 71,299.32
  4. Step 4: Simplify right side
    80,487.94x = 7,914,935,303.43
  5. Step 5: Solve for x
    x = 7,914,935,303.43/80,487.94
  6. Step 6: Final answer
    x = 98,336.91

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1.5x scale

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.