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Finding the Fourth Proportional to 208,456.88, 312,682.01 and 66,300.10

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Solution

The fourth proportional to 208,456.88, 312,682.01 and 66,300.10 is: 99,449.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,456.88 : 312,682.01 = 66,300.10 : x
  2. Step 2: Convert to fraction form
    208,456.88/312,682.01 = 66,300.10/x
  3. Step 3: Cross multiply
    208,456.88x = 312,682.01 × 66,300.10
  4. Step 4: Simplify right side
    208,456.88x = 20,730,847,418.00
  5. Step 5: Solve for x
    x = 20,730,847,418.00/208,456.88
  6. Step 6: Final answer
    x = 99,449.09

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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.