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Finding the Fourth Proportional to 122,490.60, 183,735.90 and 43,612.80

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Solution

The fourth proportional to 122,490.60, 183,735.90 and 43,612.80 is: 65,419.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,490.60 : 183,735.90 = 43,612.80 : x
  2. Step 2: Convert to fraction form
    122,490.60/183,735.90 = 43,612.80/x
  3. Step 3: Cross multiply
    122,490.60x = 183,735.90 × 43,612.80
  4. Step 4: Simplify right side
    122,490.60x = 8,013,237,059.52
  5. Step 5: Solve for x
    x = 8,013,237,059.52/122,490.60
  6. Step 6: Final answer
    x = 65,419.20

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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.