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Finding the Fourth Proportional to 210,245.80, 314,850.30 and 139,743.40

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Solution

The fourth proportional to 210,245.80, 314,850.30 and 139,743.40 is: 209,270.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,245.80 : 314,850.30 = 139,743.40 : x
  2. Step 2: Convert to fraction form
    210,245.80/314,850.30 = 139,743.40/x
  3. Step 3: Cross multiply
    210,245.80x = 314,850.30 × 139,743.40
  4. Step 4: Simplify right side
    210,245.80x = 43,998,251,413.02
  5. Step 5: Solve for x
    x = 43,998,251,413.02/210,245.80
  6. Step 6: Final answer
    x = 209,270.54

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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.