Home / 86,440.80-129,710.38-69,021.33

Finding the Fourth Proportional to 86,440.80, 129,710.38 and 69,021.33

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Solution

The fourth proportional to 86,440.80, 129,710.38 and 69,021.33 is: 103,571.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,440.80 : 129,710.38 = 69,021.33 : x
  2. Step 2: Convert to fraction form
    86,440.80/129,710.38 = 69,021.33/x
  3. Step 3: Cross multiply
    86,440.80x = 129,710.38 × 69,021.33
  4. Step 4: Simplify right side
    86,440.80x = 8,952,782,942.41
  5. Step 5: Solve for x
    x = 8,952,782,942.41/86,440.80
  6. Step 6: Final answer
    x = 103,571.26

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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.