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Finding the Fourth Proportional to 139,152.63, 208,759.19 and 45,654.87

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Solution

The fourth proportional to 139,152.63, 208,759.19 and 45,654.87 is: 68,492.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,152.63 : 208,759.19 = 45,654.87 : x
  2. Step 2: Convert to fraction form
    139,152.63/208,759.19 = 45,654.87/x
  3. Step 3: Cross multiply
    139,152.63x = 208,759.19 × 45,654.87
  4. Step 4: Simplify right side
    139,152.63x = 9,530,873,452.48
  5. Step 5: Solve for x
    x = 9,530,873,452.48/139,152.63
  6. Step 6: Final answer
    x = 68,492.23

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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.