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Finding the Fourth Proportional to 66,173.90, 99,239.52 and 21,790.09

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Solution

The fourth proportional to 66,173.90, 99,239.52 and 21,790.09 is: 32,678.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,173.90 : 99,239.52 = 21,790.09 : x
  2. Step 2: Convert to fraction form
    66,173.90/99,239.52 = 21,790.09/x
  3. Step 3: Cross multiply
    66,173.90x = 99,239.52 × 21,790.09
  4. Step 4: Simplify right side
    66,173.90x = 2,162,437,576.16
  5. Step 5: Solve for x
    x = 2,162,437,576.16/66,173.90
  6. Step 6: Final answer
    x = 32,678.10

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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.