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Finding the Fourth Proportional to 216,997.76, 299,467.20 and 121,485.44

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Solution

The fourth proportional to 216,997.76, 299,467.20 and 121,485.44 is: 167,655.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,997.76 : 299,467.20 = 121,485.44 : x
  2. Step 2: Convert to fraction form
    216,997.76/299,467.20 = 121,485.44/x
  3. Step 3: Cross multiply
    216,997.76x = 299,467.20 × 121,485.44
  4. Step 4: Simplify right side
    216,997.76x = 36,380,904,557.57
  5. Step 5: Solve for x
    x = 36,380,904,557.57/216,997.76
  6. Step 6: Final answer
    x = 167,655.67

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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.