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Finding the Fourth Proportional to 72,676.20, 100,296.72 and 40,855.08

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Solution

The fourth proportional to 72,676.20, 100,296.72 and 40,855.08 is: 56,382.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,676.20 : 100,296.72 = 40,855.08 : x
  2. Step 2: Convert to fraction form
    72,676.20/100,296.72 = 40,855.08/x
  3. Step 3: Cross multiply
    72,676.20x = 100,296.72 × 40,855.08
  4. Step 4: Simplify right side
    72,676.20x = 4,097,630,519.34
  5. Step 5: Solve for x
    x = 4,097,630,519.34/72,676.20
  6. Step 6: Final answer
    x = 56,382.01

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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.