Home / 77,420.78-116,131.32-21,261.62

Finding the Fourth Proportional to 77,420.78, 116,131.32 and 21,261.62

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Solution

The fourth proportional to 77,420.78, 116,131.32 and 21,261.62 is: 31,892.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,420.78 : 116,131.32 = 21,261.62 : x
  2. Step 2: Convert to fraction form
    77,420.78/116,131.32 = 21,261.62/x
  3. Step 3: Cross multiply
    77,420.78x = 116,131.32 × 21,261.62
  4. Step 4: Simplify right side
    77,420.78x = 2,469,139,995.94
  5. Step 5: Solve for x
    x = 2,469,139,995.94/77,420.78
  6. Step 6: Final answer
    x = 31,892.47

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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.