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Finding the Fourth Proportional to 85,115.67, 117,420.14 and 54,910.68

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Solution

The fourth proportional to 85,115.67, 117,420.14 and 54,910.68 is: 75,751.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,115.67 : 117,420.14 = 54,910.68 : x
  2. Step 2: Convert to fraction form
    85,115.67/117,420.14 = 54,910.68/x
  3. Step 3: Cross multiply
    85,115.67x = 117,420.14 × 54,910.68
  4. Step 4: Simplify right side
    85,115.67x = 6,447,619,870.37
  5. Step 5: Solve for x
    x = 6,447,619,870.37/85,115.67
  6. Step 6: Final answer
    x = 75,751.27

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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.