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Finding the Fourth Proportional to 71,866.55, 107,791.60 and 19,271.95

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Solution

The fourth proportional to 71,866.55, 107,791.60 and 19,271.95 is: 28,905.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,866.55 : 107,791.60 = 19,271.95 : x
  2. Step 2: Convert to fraction form
    71,866.55/107,791.60 = 19,271.95/x
  3. Step 3: Cross multiply
    71,866.55x = 107,791.60 × 19,271.95
  4. Step 4: Simplify right side
    71,866.55x = 2,077,354,325.62
  5. Step 5: Solve for x
    x = 2,077,354,325.62/71,866.55
  6. Step 6: Final answer
    x = 28,905.72

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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.