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Finding the Fourth Proportional to 86,993.10, 120,108.30 and 66,813.93

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Solution

The fourth proportional to 86,993.10, 120,108.30 and 66,813.93 is: 92,247.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,993.10 : 120,108.30 = 66,813.93 : x
  2. Step 2: Convert to fraction form
    86,993.10/120,108.30 = 66,813.93/x
  3. Step 3: Cross multiply
    86,993.10x = 120,108.30 × 66,813.93
  4. Step 4: Simplify right side
    86,993.10x = 8,024,907,548.62
  5. Step 5: Solve for x
    x = 8,024,907,548.62/86,993.10
  6. Step 6: Final answer
    x = 92,247.63

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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.