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Finding the Fourth Proportional to 117,181, 161,718.42 and 72,477.64

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Solution

The fourth proportional to 117,181, 161,718.42 and 72,477.64 is: 100,024.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,181 : 161,718.42 = 72,477.64 : x
  2. Step 2: Convert to fraction form
    117,181/161,718.42 = 72,477.64/x
  3. Step 3: Cross multiply
    117,181x = 161,718.42 × 72,477.64
  4. Step 4: Simplify right side
    117,181x = 11,720,969,426.13
  5. Step 5: Solve for x
    x = 11,720,969,426.13/117,181
  6. Step 6: Final answer
    x = 100,024.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.