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Finding the Fourth Proportional to 71,958.44, 99,303.08 and 40,129.35

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Solution

The fourth proportional to 71,958.44, 99,303.08 and 40,129.35 is: 55,378.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,958.44 : 99,303.08 = 40,129.35 : x
  2. Step 2: Convert to fraction form
    71,958.44/99,303.08 = 40,129.35/x
  3. Step 3: Cross multiply
    71,958.44x = 99,303.08 × 40,129.35
  4. Step 4: Simplify right side
    71,958.44x = 3,984,967,852.75
  5. Step 5: Solve for x
    x = 3,984,967,852.75/71,958.44
  6. Step 6: Final answer
    x = 55,378.75

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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.