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Finding the Fourth Proportional to 77,279.52, 106,636.86 and 43,283.28

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Solution

The fourth proportional to 77,279.52, 106,636.86 and 43,283.28 is: 59,725.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,279.52 : 106,636.86 = 43,283.28 : x
  2. Step 2: Convert to fraction form
    77,279.52/106,636.86 = 43,283.28/x
  3. Step 3: Cross multiply
    77,279.52x = 106,636.86 × 43,283.28
  4. Step 4: Simplify right side
    77,279.52x = 4,615,593,069.70
  5. Step 5: Solve for x
    x = 4,615,593,069.70/77,279.52
  6. Step 6: Final answer
    x = 59,725.95

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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.