Home / 212,629.60-318,944.40-142,127.20

Finding the Fourth Proportional to 212,629.60, 318,944.40 and 142,127.20

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Solution

The fourth proportional to 212,629.60, 318,944.40 and 142,127.20 is: 213,190.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,629.60 : 318,944.40 = 142,127.20 : x
  2. Step 2: Convert to fraction form
    212,629.60/318,944.40 = 142,127.20/x
  3. Step 3: Cross multiply
    212,629.60x = 318,944.40 × 142,127.20
  4. Step 4: Simplify right side
    212,629.60x = 45,330,674,527.68
  5. Step 5: Solve for x
    x = 45,330,674,527.68/212,629.60
  6. Step 6: Final answer
    x = 213,190.80

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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.