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Finding the Fourth Proportional to 122,485.60, 183,728.40 and 43,607.80

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Solution

The fourth proportional to 122,485.60, 183,728.40 and 43,607.80 is: 65,411.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,485.60 : 183,728.40 = 43,607.80 : x
  2. Step 2: Convert to fraction form
    122,485.60/183,728.40 = 43,607.80/x
  3. Step 3: Cross multiply
    122,485.60x = 183,728.40 × 43,607.80
  4. Step 4: Simplify right side
    122,485.60x = 8,011,991,321.52
  5. Step 5: Solve for x
    x = 8,011,991,321.52/122,485.60
  6. Step 6: Final answer
    x = 65,411.70

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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.