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Finding the Fourth Proportional to 77,451.80, 116,168.47 and 21,297.60

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Solution

The fourth proportional to 77,451.80, 116,168.47 and 21,297.60 is: 31,943.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,451.80 : 116,168.47 = 21,297.60 : x
  2. Step 2: Convert to fraction form
    77,451.80/116,168.47 = 21,297.60/x
  3. Step 3: Cross multiply
    77,451.80x = 116,168.47 × 21,297.60
  4. Step 4: Simplify right side
    77,451.80x = 2,474,109,553.43
  5. Step 5: Solve for x
    x = 2,474,109,553.43/77,451.80
  6. Step 6: Final answer
    x = 31,943.86

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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.