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Finding the Fourth Proportional to 122,310.98, 168,720.80 and 76,972.04

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Solution

The fourth proportional to 122,310.98, 168,720.80 and 76,972.04 is: 106,178.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,310.98 : 168,720.80 = 76,972.04 : x
  2. Step 2: Convert to fraction form
    122,310.98/168,720.80 = 76,972.04/x
  3. Step 3: Cross multiply
    122,310.98x = 168,720.80 × 76,972.04
  4. Step 4: Simplify right side
    122,310.98x = 12,986,784,166.43
  5. Step 5: Solve for x
    x = 12,986,784,166.43/122,310.98
  6. Step 6: Final answer
    x = 106,178.40

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