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Finding the Fourth Proportional to 172,977.60, 259,261.60 and 73,137.60

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Solution

The fourth proportional to 172,977.60, 259,261.60 and 73,137.60 is: 109,619.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,977.60 : 259,261.60 = 73,137.60 : x
  2. Step 2: Convert to fraction form
    172,977.60/259,261.60 = 73,137.60/x
  3. Step 3: Cross multiply
    172,977.60x = 259,261.60 × 73,137.60
  4. Step 4: Simplify right side
    172,977.60x = 18,961,771,196.16
  5. Step 5: Solve for x
    x = 18,961,771,196.16/172,977.60
  6. Step 6: Final answer
    x = 109,619.81

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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.