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Finding the Fourth Proportional to 71,193.51, 106,786.59 and 21,274.02

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Solution

The fourth proportional to 71,193.51, 106,786.59 and 21,274.02 is: 31,909.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,193.51 : 106,786.59 = 21,274.02 : x
  2. Step 2: Convert to fraction form
    71,193.51/106,786.59 = 21,274.02/x
  3. Step 3: Cross multiply
    71,193.51x = 106,786.59 × 21,274.02
  4. Step 4: Simplify right side
    71,193.51x = 2,271,780,051.39
  5. Step 5: Solve for x
    x = 2,271,780,051.39/71,193.51
  6. Step 6: Final answer
    x = 31,909.93

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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.