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Finding the Fourth Proportional to 111,373.80, 167,060.70 and 85,129.80

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Solution

The fourth proportional to 111,373.80, 167,060.70 and 85,129.80 is: 127,694.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,373.80 : 167,060.70 = 85,129.80 : x
  2. Step 2: Convert to fraction form
    111,373.80/167,060.70 = 85,129.80/x
  3. Step 3: Cross multiply
    111,373.80x = 167,060.70 × 85,129.80
  4. Step 4: Simplify right side
    111,373.80x = 14,221,843,978.86
  5. Step 5: Solve for x
    x = 14,221,843,978.86/111,373.80
  6. Step 6: Final answer
    x = 127,694.70

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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.