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Finding the Fourth Proportional to 217,394.10, 300,003.90 and 121,900.86

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Solution

The fourth proportional to 217,394.10, 300,003.90 and 121,900.86 is: 168,223.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,394.10 : 300,003.90 = 121,900.86 : x
  2. Step 2: Convert to fraction form
    217,394.10/300,003.90 = 121,900.86/x
  3. Step 3: Cross multiply
    217,394.10x = 300,003.90 × 121,900.86
  4. Step 4: Simplify right side
    217,394.10x = 36,570,733,413.35
  5. Step 5: Solve for x
    x = 36,570,733,413.35/217,394.10
  6. Step 6: Final answer
    x = 168,223.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.