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Finding the Fourth Proportional to 121,437.80, 167,714.87 and 92,448.21

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Solution

The fourth proportional to 121,437.80, 167,714.87 and 92,448.21 is: 127,678.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,437.80 : 167,714.87 = 92,448.21 : x
  2. Step 2: Convert to fraction form
    121,437.80/167,714.87 = 92,448.21/x
  3. Step 3: Cross multiply
    121,437.80x = 167,714.87 × 92,448.21
  4. Step 4: Simplify right side
    121,437.80x = 15,504,939,265.20
  5. Step 5: Solve for x
    x = 15,504,939,265.20/121,437.80
  6. Step 6: Final answer
    x = 127,678.03

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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.