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Finding the Fourth Proportional to 139,930.76, 209,834.34 and 40,068.26

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Solution

The fourth proportional to 139,930.76, 209,834.34 and 40,068.26 is: 60,084.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,930.76 : 209,834.34 = 40,068.26 : x
  2. Step 2: Convert to fraction form
    139,930.76/209,834.34 = 40,068.26/x
  3. Step 3: Cross multiply
    139,930.76x = 209,834.34 × 40,068.26
  4. Step 4: Simplify right side
    139,930.76x = 8,407,696,892.05
  5. Step 5: Solve for x
    x = 8,407,696,892.05/139,930.76
  6. Step 6: Final answer
    x = 60,084.69

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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.