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Finding the Fourth Proportional to 71,292.96, 106,936 and 18,701.28

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Solution

The fourth proportional to 71,292.96, 106,936 and 18,701.28 is: 28,051.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,292.96 : 106,936 = 18,701.28 : x
  2. Step 2: Convert to fraction form
    71,292.96/106,936 = 18,701.28/x
  3. Step 3: Cross multiply
    71,292.96x = 106,936 × 18,701.28
  4. Step 4: Simplify right side
    71,292.96x = 1,999,840,078.08
  5. Step 5: Solve for x
    x = 1,999,840,078.08/71,292.96
  6. Step 6: Final answer
    x = 28,051.02

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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.