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Finding the Fourth Proportional to 85,992.72, 118,710 and 57,360.03

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Solution

The fourth proportional to 85,992.72, 118,710 and 57,360.03 is: 79,183.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,992.72 : 118,710 = 57,360.03 : x
  2. Step 2: Convert to fraction form
    85,992.72/118,710 = 57,360.03/x
  3. Step 3: Cross multiply
    85,992.72x = 118,710 × 57,360.03
  4. Step 4: Simplify right side
    85,992.72x = 6,809,209,161.30
  5. Step 5: Solve for x
    x = 6,809,209,161.30/85,992.72
  6. Step 6: Final answer
    x = 79,183.55

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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.