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Finding the Fourth Proportional to 77,287.26, 115,912.26 and 21,127.62

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Solution

The fourth proportional to 77,287.26, 115,912.26 and 21,127.62 is: 31,686.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,287.26 : 115,912.26 = 21,127.62 : x
  2. Step 2: Convert to fraction form
    77,287.26/115,912.26 = 21,127.62/x
  3. Step 3: Cross multiply
    77,287.26x = 115,912.26 × 21,127.62
  4. Step 4: Simplify right side
    77,287.26x = 2,448,950,182.62
  5. Step 5: Solve for x
    x = 2,448,950,182.62/77,287.26
  6. Step 6: Final answer
    x = 31,686.34

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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.