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Finding the Fourth Proportional to 111,769.80, 167,217.30 and 72,403.80

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Solution

The fourth proportional to 111,769.80, 167,217.30 and 72,403.80 is: 108,322.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,769.80 : 167,217.30 = 72,403.80 : x
  2. Step 2: Convert to fraction form
    111,769.80/167,217.30 = 72,403.80/x
  3. Step 3: Cross multiply
    111,769.80x = 167,217.30 × 72,403.80
  4. Step 4: Simplify right side
    111,769.80x = 12,107,167,945.74
  5. Step 5: Solve for x
    x = 12,107,167,945.74/111,769.80
  6. Step 6: Final answer
    x = 108,322.35

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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.