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Finding the Fourth Proportional to 72,808.88, 109,120.98 and 32,785.16

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Solution

The fourth proportional to 72,808.88, 109,120.98 and 32,785.16 is: 49,136.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,808.88 : 109,120.98 = 32,785.16 : x
  2. Step 2: Convert to fraction form
    72,808.88/109,120.98 = 32,785.16/x
  3. Step 3: Cross multiply
    72,808.88x = 109,120.98 × 32,785.16
  4. Step 4: Simplify right side
    72,808.88x = 3,577,548,788.66
  5. Step 5: Solve for x
    x = 3,577,548,788.66/72,808.88
  6. Step 6: Final answer
    x = 49,136.16

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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.