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Finding the Fourth Proportional to 180,980.88, 271,561.84 and 81,212.40

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Solution

The fourth proportional to 180,980.88, 271,561.84 and 81,212.40 is: 121,859.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,980.88 : 271,561.84 = 81,212.40 : x
  2. Step 2: Convert to fraction form
    180,980.88/271,561.84 = 81,212.40/x
  3. Step 3: Cross multiply
    180,980.88x = 271,561.84 × 81,212.40
  4. Step 4: Simplify right side
    180,980.88x = 22,054,188,774.82
  5. Step 5: Solve for x
    x = 22,054,188,774.82/180,980.88
  6. Step 6: Final answer
    x = 121,859.22

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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.