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Finding the Fourth Proportional to 85,806.12, 118,372.42 and 53,992.56

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Solution

The fourth proportional to 85,806.12, 118,372.42 and 53,992.56 is: 74,484.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,806.12 : 118,372.42 = 53,992.56 : x
  2. Step 2: Convert to fraction form
    85,806.12/118,372.42 = 53,992.56/x
  3. Step 3: Cross multiply
    85,806.12x = 118,372.42 × 53,992.56
  4. Step 4: Simplify right side
    85,806.12x = 6,391,229,989.20
  5. Step 5: Solve for x
    x = 6,391,229,989.20/85,806.12
  6. Step 6: Final answer
    x = 74,484.55

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1.5x scale

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.