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Finding the Fourth Proportional to 122,286.60, 183,429.90 and 66,299.40

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Solution

The fourth proportional to 122,286.60, 183,429.90 and 66,299.40 is: 99,449.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,286.60 : 183,429.90 = 66,299.40 : x
  2. Step 2: Convert to fraction form
    122,286.60/183,429.90 = 66,299.40/x
  3. Step 3: Cross multiply
    122,286.60x = 183,429.90 × 66,299.40
  4. Step 4: Simplify right side
    122,286.60x = 12,161,292,312.06
  5. Step 5: Solve for x
    x = 12,161,292,312.06/122,286.60
  6. Step 6: Final answer
    x = 99,449.10

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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.