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Finding the Fourth Proportional to 143,164.80, 197,559 and 79,498.80

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Solution

The fourth proportional to 143,164.80, 197,559 and 79,498.80 is: 109,703.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,164.80 : 197,559 = 79,498.80 : x
  2. Step 2: Convert to fraction form
    143,164.80/197,559 = 79,498.80/x
  3. Step 3: Cross multiply
    143,164.80x = 197,559 × 79,498.80
  4. Step 4: Simplify right side
    143,164.80x = 15,705,703,429.20
  5. Step 5: Solve for x
    x = 15,705,703,429.20/143,164.80
  6. Step 6: Final answer
    x = 109,703.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.