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Finding the Fourth Proportional to 139,718,879.70, 209,578,319.55 and 63,191,375.70

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Solution

The fourth proportional to 139,718,879.70, 209,578,319.55 and 63,191,375.70 is: 94,787,063.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,718,879.70 : 209,578,319.55 = 63,191,375.70 : x
  2. Step 2: Convert to fraction form
    139,718,879.70/209,578,319.55 = 63,191,375.70/x
  3. Step 3: Cross multiply
    139,718,879.70x = 209,578,319.55 × 63,191,375.70
  4. Step 4: Simplify right side
    139,718,879.70x = 13,243,542,329,258,706
  5. Step 5: Solve for x
    x = 13,243,542,329,258,706/139,718,879.70
  6. Step 6: Final answer
    x = 94,787,063.55

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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.