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Finding the Fourth Proportional to 85,474.80, 117,887.97 and 79,745.28

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Solution

The fourth proportional to 85,474.80, 117,887.97 and 79,745.28 is: 109,985.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,474.80 : 117,887.97 = 79,745.28 : x
  2. Step 2: Convert to fraction form
    85,474.80/117,887.97 = 79,745.28/x
  3. Step 3: Cross multiply
    85,474.80x = 117,887.97 × 79,745.28
  4. Step 4: Simplify right side
    85,474.80x = 9,401,009,176.28
  5. Step 5: Solve for x
    x = 9,401,009,176.28/85,474.80
  6. Step 6: Final answer
    x = 109,985.74

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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.