Home / 77,021.80-115,571.10-43,767.40

Finding the Fourth Proportional to 77,021.80, 115,571.10 and 43,767.40

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Solution

The fourth proportional to 77,021.80, 115,571.10 and 43,767.40 is: 65,672.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,021.80 : 115,571.10 = 43,767.40 : x
  2. Step 2: Convert to fraction form
    77,021.80/115,571.10 = 43,767.40/x
  3. Step 3: Cross multiply
    77,021.80x = 115,571.10 × 43,767.40
  4. Step 4: Simplify right side
    77,021.80x = 5,058,246,562.14
  5. Step 5: Solve for x
    x = 5,058,246,562.14/77,021.80
  6. Step 6: Final answer
    x = 65,672.92

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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.