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Finding the Fourth Proportional to 208,441.26, 312,629.22 and 66,267.90

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Solution

The fourth proportional to 208,441.26, 312,629.22 and 66,267.90 is: 99,391.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,441.26 : 312,629.22 = 66,267.90 : x
  2. Step 2: Convert to fraction form
    208,441.26/312,629.22 = 66,267.90/x
  3. Step 3: Cross multiply
    208,441.26x = 312,629.22 × 66,267.90
  4. Step 4: Simplify right side
    208,441.26x = 20,717,281,888.04
  5. Step 5: Solve for x
    x = 20,717,281,888.04/208,441.26
  6. Step 6: Final answer
    x = 99,391.46

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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.