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Finding the Fourth Proportional to 139,000.60, 208,452.30 and 72,418.60

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Solution

The fourth proportional to 139,000.60, 208,452.30 and 72,418.60 is: 108,602.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,000.60 : 208,452.30 = 72,418.60 : x
  2. Step 2: Convert to fraction form
    139,000.60/208,452.30 = 72,418.60/x
  3. Step 3: Cross multiply
    139,000.60x = 208,452.30 × 72,418.60
  4. Step 4: Simplify right side
    139,000.60x = 15,095,823,732.78
  5. Step 5: Solve for x
    x = 15,095,823,732.78/139,000.60
  6. Step 6: Final answer
    x = 108,602.58

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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.