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Finding the Fourth Proportional to 139,968,321.70, 209,952,482.55 and 131,010,369.70

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Solution

The fourth proportional to 139,968,321.70, 209,952,482.55 and 131,010,369.70 is: 196,515,554.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,321.70 : 209,952,482.55 = 131,010,369.70 : x
  2. Step 2: Convert to fraction form
    139,968,321.70/209,952,482.55 = 131,010,369.70/x
  3. Step 3: Cross multiply
    139,968,321.70x = 209,952,482.55 × 131,010,369.70
  4. Step 4: Simplify right side
    139,968,321.70x = 27,505,952,358,308,300
  5. Step 5: Solve for x
    x = 27,505,952,358,308,300/139,968,321.70
  6. Step 6: Final answer
    x = 196,515,554.55

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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.