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Finding the Fourth Proportional to 71,796.50, 99,077.44 and 39,964.70

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Solution

The fourth proportional to 71,796.50, 99,077.44 and 39,964.70 is: 55,150.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,796.50 : 99,077.44 = 39,964.70 : x
  2. Step 2: Convert to fraction form
    71,796.50/99,077.44 = 39,964.70/x
  3. Step 3: Cross multiply
    71,796.50x = 99,077.44 × 39,964.70
  4. Step 4: Simplify right side
    71,796.50x = 3,959,600,166.37
  5. Step 5: Solve for x
    x = 3,959,600,166.37/71,796.50
  6. Step 6: Final answer
    x = 55,150.32

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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.