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Finding the Fourth Proportional to 71,327.99, 106,991.72 and 21,407.87

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Solution

The fourth proportional to 71,327.99, 106,991.72 and 21,407.87 is: 32,111.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,327.99 : 106,991.72 = 21,407.87 : x
  2. Step 2: Convert to fraction form
    71,327.99/106,991.72 = 21,407.87/x
  3. Step 3: Cross multiply
    71,327.99x = 106,991.72 × 21,407.87
  4. Step 4: Simplify right side
    71,327.99x = 2,290,464,351.40
  5. Step 5: Solve for x
    x = 2,290,464,351.40/71,327.99
  6. Step 6: Final answer
    x = 32,111.72

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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.