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Finding the Fourth Proportional to 111,553.58, 167,330.64 and 78,421.88

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Solution

The fourth proportional to 111,553.58, 167,330.64 and 78,421.88 is: 117,633.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,553.58 : 167,330.64 = 78,421.88 : x
  2. Step 2: Convert to fraction form
    111,553.58/167,330.64 = 78,421.88/x
  3. Step 3: Cross multiply
    111,553.58x = 167,330.64 × 78,421.88
  4. Step 4: Simplify right side
    111,553.58x = 13,122,383,370.40
  5. Step 5: Solve for x
    x = 13,122,383,370.40/111,553.58
  6. Step 6: Final answer
    x = 117,633.01

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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.