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Finding the Fourth Proportional to 112,575.88, 168,922.14 and 81,666.28

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Solution

The fourth proportional to 112,575.88, 168,922.14 and 81,666.28 is: 122,541.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,575.88 : 168,922.14 = 81,666.28 : x
  2. Step 2: Convert to fraction form
    112,575.88/168,922.14 = 81,666.28/x
  3. Step 3: Cross multiply
    112,575.88x = 168,922.14 × 81,666.28
  4. Step 4: Simplify right side
    112,575.88x = 13,795,242,783.44
  5. Step 5: Solve for x
    x = 13,795,242,783.44/112,575.88
  6. Step 6: Final answer
    x = 122,541.73

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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.