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Finding the Fourth Proportional to 69,171.86, 103,742.21 and 45,148.60

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Solution

The fourth proportional to 69,171.86, 103,742.21 and 45,148.60 is: 67,712.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,171.86 : 103,742.21 = 45,148.60 : x
  2. Step 2: Convert to fraction form
    69,171.86/103,742.21 = 45,148.60/x
  3. Step 3: Cross multiply
    69,171.86x = 103,742.21 × 45,148.60
  4. Step 4: Simplify right side
    69,171.86x = 4,683,815,784.96
  5. Step 5: Solve for x
    x = 4,683,815,784.96/69,171.86
  6. Step 6: Final answer
    x = 67,712.73

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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.