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Finding the Fourth Proportional to 139,719, 209,585.46 and 39,894

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Solution

The fourth proportional to 139,719, 209,585.46 and 39,894 is: 59,842.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,719 : 209,585.46 = 39,894 : x
  2. Step 2: Convert to fraction form
    139,719/209,585.46 = 39,894/x
  3. Step 3: Cross multiply
    139,719x = 209,585.46 × 39,894
  4. Step 4: Simplify right side
    139,719x = 8,361,202,341.24
  5. Step 5: Solve for x
    x = 8,361,202,341.24/139,719
  6. Step 6: Final answer
    x = 59,842.99

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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.