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Finding the Fourth Proportional to 210,860.16, 315,778.32 and 115,945.44

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Solution

The fourth proportional to 210,860.16, 315,778.32 and 115,945.44 is: 173,636.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,860.16 : 315,778.32 = 115,945.44 : x
  2. Step 2: Convert to fraction form
    210,860.16/315,778.32 = 115,945.44/x
  3. Step 3: Cross multiply
    210,860.16x = 315,778.32 × 115,945.44
  4. Step 4: Simplify right side
    210,860.16x = 36,613,056,254.86
  5. Step 5: Solve for x
    x = 36,613,056,254.86/210,860.16
  6. Step 6: Final answer
    x = 173,636.67

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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.