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Finding the Fourth Proportional to 139,396.88, 209,103.12 and 44,635.40

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Solution

The fourth proportional to 139,396.88, 209,103.12 and 44,635.40 is: 66,955.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,396.88 : 209,103.12 = 44,635.40 : x
  2. Step 2: Convert to fraction form
    139,396.88/209,103.12 = 44,635.40/x
  3. Step 3: Cross multiply
    139,396.88x = 209,103.12 × 44,635.40
  4. Step 4: Simplify right side
    139,396.88x = 9,333,401,402.45
  5. Step 5: Solve for x
    x = 9,333,401,402.45/139,396.88
  6. Step 6: Final answer
    x = 66,955.60

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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.