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Finding the Fourth Proportional to 111,809.70, 167,714.55 and 76,817.70

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Solution

The fourth proportional to 111,809.70, 167,714.55 and 76,817.70 is: 115,226.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,809.70 : 167,714.55 = 76,817.70 : x
  2. Step 2: Convert to fraction form
    111,809.70/167,714.55 = 76,817.70/x
  3. Step 3: Cross multiply
    111,809.70x = 167,714.55 × 76,817.70
  4. Step 4: Simplify right side
    111,809.70x = 12,883,445,987.54
  5. Step 5: Solve for x
    x = 12,883,445,987.54/111,809.70
  6. Step 6: Final answer
    x = 115,226.55

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1.5x scale

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.