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Finding the Fourth Proportional to 71,499.30, 107,249.65 and 21,579.81

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Solution

The fourth proportional to 71,499.30, 107,249.65 and 21,579.81 is: 32,369.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,499.30 : 107,249.65 = 21,579.81 : x
  2. Step 2: Convert to fraction form
    71,499.30/107,249.65 = 21,579.81/x
  3. Step 3: Cross multiply
    71,499.30x = 107,249.65 × 21,579.81
  4. Step 4: Simplify right side
    71,499.30x = 2,314,427,069.57
  5. Step 5: Solve for x
    x = 2,314,427,069.57/71,499.30
  6. Step 6: Final answer
    x = 32,369.93

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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.