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Finding the Fourth Proportional to 111,700.80, 167,113.80 and 72,334.80

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Solution

The fourth proportional to 111,700.80, 167,113.80 and 72,334.80 is: 108,218.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,700.80 : 167,113.80 = 72,334.80 : x
  2. Step 2: Convert to fraction form
    111,700.80/167,113.80 = 72,334.80/x
  3. Step 3: Cross multiply
    111,700.80x = 167,113.80 × 72,334.80
  4. Step 4: Simplify right side
    111,700.80x = 12,088,143,300.24
  5. Step 5: Solve for x
    x = 12,088,143,300.24/111,700.80
  6. Step 6: Final answer
    x = 108,218.95

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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.