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Finding the Fourth Proportional to 71,843.51, 99,140.14 and 39,571.84

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Solution

The fourth proportional to 71,843.51, 99,140.14 and 39,571.84 is: 54,606.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,843.51 : 99,140.14 = 39,571.84 : x
  2. Step 2: Convert to fraction form
    71,843.51/99,140.14 = 39,571.84/x
  3. Step 3: Cross multiply
    71,843.51x = 99,140.14 × 39,571.84
  4. Step 4: Simplify right side
    71,843.51x = 3,923,157,931.05
  5. Step 5: Solve for x
    x = 3,923,157,931.05/71,843.51
  6. Step 6: Final answer
    x = 54,606.99

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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.