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Finding the Fourth Proportional to 76,322.82, 105,414.27 and 61,062.28

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Solution

The fourth proportional to 76,322.82, 105,414.27 and 61,062.28 is: 84,336.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,322.82 : 105,414.27 = 61,062.28 : x
  2. Step 2: Convert to fraction form
    76,322.82/105,414.27 = 61,062.28/x
  3. Step 3: Cross multiply
    76,322.82x = 105,414.27 × 61,062.28
  4. Step 4: Simplify right side
    76,322.82x = 6,436,835,670.74
  5. Step 5: Solve for x
    x = 6,436,835,670.74/76,322.82
  6. Step 6: Final answer
    x = 84,336.97

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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.