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Finding the Fourth Proportional to 219,602.72, 329,608.20 and 86,574.80

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Solution

The fourth proportional to 219,602.72, 329,608.20 and 86,574.80 is: 129,942.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,602.72 : 329,608.20 = 86,574.80 : x
  2. Step 2: Convert to fraction form
    219,602.72/329,608.20 = 86,574.80/x
  3. Step 3: Cross multiply
    219,602.72x = 329,608.20 × 86,574.80
  4. Step 4: Simplify right side
    219,602.72x = 28,535,763,993.36
  5. Step 5: Solve for x
    x = 28,535,763,993.36/219,602.72
  6. Step 6: Final answer
    x = 129,942.67

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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.