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Finding the Fourth Proportional to 120,897.43, 166,790.68 and 69,900.82

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Solution

The fourth proportional to 120,897.43, 166,790.68 and 69,900.82 is: 96,435.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,897.43 : 166,790.68 = 69,900.82 : x
  2. Step 2: Convert to fraction form
    120,897.43/166,790.68 = 69,900.82/x
  3. Step 3: Cross multiply
    120,897.43x = 166,790.68 × 69,900.82
  4. Step 4: Simplify right side
    120,897.43x = 11,658,804,116.90
  5. Step 5: Solve for x
    x = 11,658,804,116.90/120,897.43
  6. Step 6: Final answer
    x = 96,435.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.