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Finding the Fourth Proportional to 86,999.60, 120,067.87 and 48,765.64

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Solution

The fourth proportional to 86,999.60, 120,067.87 and 48,765.64 is: 67,301.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,999.60 : 120,067.87 = 48,765.64 : x
  2. Step 2: Convert to fraction form
    86,999.60/120,067.87 = 48,765.64/x
  3. Step 3: Cross multiply
    86,999.60x = 120,067.87 × 48,765.64
  4. Step 4: Simplify right side
    86,999.60x = 5,855,186,523.99
  5. Step 5: Solve for x
    x = 5,855,186,523.99/86,999.60
  6. Step 6: Final answer
    x = 67,301.30

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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.