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Finding the Fourth Proportional to 76,712.56, 105,863.28 and 43,179.28

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Solution

The fourth proportional to 76,712.56, 105,863.28 and 43,179.28 is: 59,587.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,712.56 : 105,863.28 = 43,179.28 : x
  2. Step 2: Convert to fraction form
    76,712.56/105,863.28 = 43,179.28/x
  3. Step 3: Cross multiply
    76,712.56x = 105,863.28 × 43,179.28
  4. Step 4: Simplify right side
    76,712.56x = 4,571,100,208.84
  5. Step 5: Solve for x
    x = 4,571,100,208.84/76,712.56
  6. Step 6: Final answer
    x = 59,587.38

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1.5x scale

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.