Home / 212,021.80-318,032.70-54,262.60

Finding the Fourth Proportional to 212,021.80, 318,032.70 and 54,262.60

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Solution

The fourth proportional to 212,021.80, 318,032.70 and 54,262.60 is: 81,393.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,021.80 : 318,032.70 = 54,262.60 : x
  2. Step 2: Convert to fraction form
    212,021.80/318,032.70 = 54,262.60/x
  3. Step 3: Cross multiply
    212,021.80x = 318,032.70 × 54,262.60
  4. Step 4: Simplify right side
    212,021.80x = 17,257,281,187.02
  5. Step 5: Solve for x
    x = 17,257,281,187.02/212,021.80
  6. Step 6: Final answer
    x = 81,393.90

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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.