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Finding the Fourth Proportional to 85,249.35, 117,600.87 and 65,071.20

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Solution

The fourth proportional to 85,249.35, 117,600.87 and 65,071.20 is: 89,765.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,249.35 : 117,600.87 = 65,071.20 : x
  2. Step 2: Convert to fraction form
    85,249.35/117,600.87 = 65,071.20/x
  3. Step 3: Cross multiply
    85,249.35x = 117,600.87 × 65,071.20
  4. Step 4: Simplify right side
    85,249.35x = 7,652,429,731.94
  5. Step 5: Solve for x
    x = 7,652,429,731.94/85,249.35
  6. Step 6: Final answer
    x = 89,765.26

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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.