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Finding the Fourth Proportional to 81,661.08, 122,437.56 and 39,457.56

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Solution

The fourth proportional to 81,661.08, 122,437.56 and 39,457.56 is: 59,160.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,661.08 : 122,437.56 = 39,457.56 : x
  2. Step 2: Convert to fraction form
    81,661.08/122,437.56 = 39,457.56/x
  3. Step 3: Cross multiply
    81,661.08x = 122,437.56 × 39,457.56
  4. Step 4: Simplify right side
    81,661.08x = 4,831,087,369.95
  5. Step 5: Solve for x
    x = 4,831,087,369.95/81,661.08
  6. Step 6: Final answer
    x = 59,160.22

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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.