Home / 211,977.72-318,028.43-85,553.40

Finding the Fourth Proportional to 211,977.72, 318,028.43 and 85,553.40

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Solution

The fourth proportional to 211,977.72, 318,028.43 and 85,553.40 is: 128,355.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,977.72 : 318,028.43 = 85,553.40 : x
  2. Step 2: Convert to fraction form
    211,977.72/318,028.43 = 85,553.40/x
  3. Step 3: Cross multiply
    211,977.72x = 318,028.43 × 85,553.40
  4. Step 4: Simplify right side
    211,977.72x = 27,208,413,483.16
  5. Step 5: Solve for x
    x = 27,208,413,483.16/211,977.72
  6. Step 6: Final answer
    x = 128,355.06

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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.