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Finding the Fourth Proportional to 108,021.60, 161,643.60 and 73,029.60

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Solution

The fourth proportional to 108,021.60, 161,643.60 and 73,029.60 is: 109,281.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,021.60 : 161,643.60 = 73,029.60 : x
  2. Step 2: Convert to fraction form
    108,021.60/161,643.60 = 73,029.60/x
  3. Step 3: Cross multiply
    108,021.60x = 161,643.60 × 73,029.60
  4. Step 4: Simplify right side
    108,021.60x = 11,804,767,450.56
  5. Step 5: Solve for x
    x = 11,804,767,450.56/108,021.60
  6. Step 6: Final answer
    x = 109,281.55

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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.