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Finding the Fourth Proportional to 120,246.89, 165,868.41 and 79,411.39

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Solution

The fourth proportional to 120,246.89, 165,868.41 and 79,411.39 is: 109,539.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,246.89 : 165,868.41 = 79,411.39 : x
  2. Step 2: Convert to fraction form
    120,246.89/165,868.41 = 79,411.39/x
  3. Step 3: Cross multiply
    120,246.89x = 165,868.41 × 79,411.39
  4. Step 4: Simplify right side
    120,246.89x = 13,171,841,466.40
  5. Step 5: Solve for x
    x = 13,171,841,466.40/120,246.89
  6. Step 6: Final answer
    x = 109,539.98

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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.