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Finding the Fourth Proportional to 71,911.94, 99,240.81 and 40,087.58

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Solution

The fourth proportional to 71,911.94, 99,240.81 and 40,087.58 is: 55,322.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,911.94 : 99,240.81 = 40,087.58 : x
  2. Step 2: Convert to fraction form
    71,911.94/99,240.81 = 40,087.58/x
  3. Step 3: Cross multiply
    71,911.94x = 99,240.81 × 40,087.58
  4. Step 4: Simplify right side
    71,911.94x = 3,978,323,910.14
  5. Step 5: Solve for x
    x = 3,978,323,910.14/71,911.94
  6. Step 6: Final answer
    x = 55,322.16

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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.