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Finding the Fourth Proportional to 214,969.60, 322,600.20 and 139,906.90

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Solution

The fourth proportional to 214,969.60, 322,600.20 and 139,906.90 is: 209,955.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,969.60 : 322,600.20 = 139,906.90 : x
  2. Step 2: Convert to fraction form
    214,969.60/322,600.20 = 139,906.90/x
  3. Step 3: Cross multiply
    214,969.60x = 322,600.20 × 139,906.90
  4. Step 4: Simplify right side
    214,969.60x = 45,133,993,921.38
  5. Step 5: Solve for x
    x = 45,133,993,921.38/214,969.60
  6. Step 6: Final answer
    x = 209,955.24

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1.5x scale

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.