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Finding the Fourth Proportional to 122,392.60, 183,696.90 and 72,410.20

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Solution

The fourth proportional to 122,392.60, 183,696.90 and 72,410.20 is: 108,679.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,392.60 : 183,696.90 = 72,410.20 : x
  2. Step 2: Convert to fraction form
    122,392.60/183,696.90 = 72,410.20/x
  3. Step 3: Cross multiply
    122,392.60x = 183,696.90 × 72,410.20
  4. Step 4: Simplify right side
    122,392.60x = 13,301,529,268.38
  5. Step 5: Solve for x
    x = 13,301,529,268.38/122,392.60
  6. Step 6: Final answer
    x = 108,679.20

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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.