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Finding the Fourth Proportional to 139,408.62, 209,081.58 and 39,566.70

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Solution

The fourth proportional to 139,408.62, 209,081.58 and 39,566.70 is: 59,341.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,408.62 : 209,081.58 = 39,566.70 : x
  2. Step 2: Convert to fraction form
    139,408.62/209,081.58 = 39,566.70/x
  3. Step 3: Cross multiply
    139,408.62x = 209,081.58 × 39,566.70
  4. Step 4: Simplify right side
    139,408.62x = 8,272,668,151.39
  5. Step 5: Solve for x
    x = 8,272,668,151.39/139,408.62
  6. Step 6: Final answer
    x = 59,341.15

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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.