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Finding the Fourth Proportional to 77,279.53, 106,644.51 and 43,287.94

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Solution

The fourth proportional to 77,279.53, 106,644.51 and 43,287.94 is: 59,736.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,279.53 : 106,644.51 = 43,287.94 : x
  2. Step 2: Convert to fraction form
    77,279.53/106,644.51 = 43,287.94/x
  3. Step 3: Cross multiply
    77,279.53x = 106,644.51 × 43,287.94
  4. Step 4: Simplify right side
    77,279.53x = 4,616,421,150.21
  5. Step 5: Solve for x
    x = 4,616,421,150.21/77,279.53
  6. Step 6: Final answer
    x = 59,736.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.