Home / 323,826.80-485,732.90-87,172.36

Finding the Fourth Proportional to 323,826.80, 485,732.90 and 87,172.36

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Solution

The fourth proportional to 323,826.80, 485,732.90 and 87,172.36 is: 130,756.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,826.80 : 485,732.90 = 87,172.36 : x
  2. Step 2: Convert to fraction form
    323,826.80/485,732.90 = 87,172.36/x
  3. Step 3: Cross multiply
    323,826.80x = 485,732.90 × 87,172.36
  4. Step 4: Simplify right side
    323,826.80x = 42,342,483,222.64
  5. Step 5: Solve for x
    x = 42,342,483,222.64/323,826.80
  6. Step 6: Final answer
    x = 130,756.57

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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.