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Finding the Fourth Proportional to 72,619.56, 100,225.08 and 40,790.88

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Solution

The fourth proportional to 72,619.56, 100,225.08 and 40,790.88 is: 56,297.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,619.56 : 100,225.08 = 40,790.88 : x
  2. Step 2: Convert to fraction form
    72,619.56/100,225.08 = 40,790.88/x
  3. Step 3: Cross multiply
    72,619.56x = 100,225.08 × 40,790.88
  4. Step 4: Simplify right side
    72,619.56x = 4,088,269,211.27
  5. Step 5: Solve for x
    x = 4,088,269,211.27/72,619.56
  6. Step 6: Final answer
    x = 56,297.08

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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.