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Finding the Fourth Proportional to 111,715.20, 167,443.20 and 45,122.40

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Solution

The fourth proportional to 111,715.20, 167,443.20 and 45,122.40 is: 67,631.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,715.20 : 167,443.20 = 45,122.40 : x
  2. Step 2: Convert to fraction form
    111,715.20/167,443.20 = 45,122.40/x
  3. Step 3: Cross multiply
    111,715.20x = 167,443.20 × 45,122.40
  4. Step 4: Simplify right side
    111,715.20x = 7,555,439,047.68
  5. Step 5: Solve for x
    x = 7,555,439,047.68/111,715.20
  6. Step 6: Final answer
    x = 67,631.25

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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.