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Finding the Fourth Proportional to 139,951.20, 209,792.40 and 46,408.80

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Solution

The fourth proportional to 139,951.20, 209,792.40 and 46,408.80 is: 69,568.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,951.20 : 209,792.40 = 46,408.80 : x
  2. Step 2: Convert to fraction form
    139,951.20/209,792.40 = 46,408.80/x
  3. Step 3: Cross multiply
    139,951.20x = 209,792.40 × 46,408.80
  4. Step 4: Simplify right side
    139,951.20x = 9,736,213,533.12
  5. Step 5: Solve for x
    x = 9,736,213,533.12/139,951.20
  6. Step 6: Final answer
    x = 69,568.63

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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.