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Finding the Fourth Proportional to 66,246.57, 99,379.71 and 21,878.01

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Solution

The fourth proportional to 66,246.57, 99,379.71 and 21,878.01 is: 32,820.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,246.57 : 99,379.71 = 21,878.01 : x
  2. Step 2: Convert to fraction form
    66,246.57/99,379.71 = 21,878.01/x
  3. Step 3: Cross multiply
    66,246.57x = 99,379.71 × 21,878.01
  4. Step 4: Simplify right side
    66,246.57x = 2,174,230,289.18
  5. Step 5: Solve for x
    x = 2,174,230,289.18/66,246.57
  6. Step 6: Final answer
    x = 32,820.27

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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.