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Finding the Fourth Proportional to 66,367.72, 99,563.82 and 18,980.84

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Solution

The fourth proportional to 66,367.72, 99,563.82 and 18,980.84 is: 28,474.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,367.72 : 99,563.82 = 18,980.84 : x
  2. Step 2: Convert to fraction form
    66,367.72/99,563.82 = 18,980.84/x
  3. Step 3: Cross multiply
    66,367.72x = 99,563.82 × 18,980.84
  4. Step 4: Simplify right side
    66,367.72x = 1,889,804,937.21
  5. Step 5: Solve for x
    x = 1,889,804,937.21/66,367.72
  6. Step 6: Final answer
    x = 28,474.76

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1.5x scale

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.