Home / 213,709.20-320,564.21-87,349.36

Finding the Fourth Proportional to 213,709.20, 320,564.21 and 87,349.36

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Solution

The fourth proportional to 213,709.20, 320,564.21 and 87,349.36 is: 131,024.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,709.20 : 320,564.21 = 87,349.36 : x
  2. Step 2: Convert to fraction form
    213,709.20/320,564.21 = 87,349.36/x
  3. Step 3: Cross multiply
    213,709.20x = 320,564.21 × 87,349.36
  4. Step 4: Simplify right side
    213,709.20x = 28,001,077,043.72
  5. Step 5: Solve for x
    x = 28,001,077,043.72/213,709.20
  6. Step 6: Final answer
    x = 131,024.20

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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.