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Finding the Fourth Proportional to 75,991.82, 113,987.72 and 20,587.82

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Solution

The fourth proportional to 75,991.82, 113,987.72 and 20,587.82 is: 30,881.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,991.82 : 113,987.72 = 20,587.82 : x
  2. Step 2: Convert to fraction form
    75,991.82/113,987.72 = 20,587.82/x
  3. Step 3: Cross multiply
    75,991.82x = 113,987.72 × 20,587.82
  4. Step 4: Simplify right side
    75,991.82x = 2,346,758,558.63
  5. Step 5: Solve for x
    x = 2,346,758,558.63/75,991.82
  6. Step 6: Final answer
    x = 30,881.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.