Home / 221,068.16-331,356-87,912.80

Finding the Fourth Proportional to 221,068.16, 331,356 and 87,912.80

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Solution

The fourth proportional to 221,068.16, 331,356 and 87,912.80 is: 131,771.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,068.16 : 331,356 = 87,912.80 : x
  2. Step 2: Convert to fraction form
    221,068.16/331,356 = 87,912.80/x
  3. Step 3: Cross multiply
    221,068.16x = 331,356 × 87,912.80
  4. Step 4: Simplify right side
    221,068.16x = 29,130,433,756.80
  5. Step 5: Solve for x
    x = 29,130,433,756.80/221,068.16
  6. Step 6: Final answer
    x = 131,771.28

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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.