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Finding the Fourth Proportional to 76,822.60, 115,125.90 and 61,054.60

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Solution

The fourth proportional to 76,822.60, 115,125.90 and 61,054.60 is: 91,496.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,822.60 : 115,125.90 = 61,054.60 : x
  2. Step 2: Convert to fraction form
    76,822.60/115,125.90 = 61,054.60/x
  3. Step 3: Cross multiply
    76,822.60x = 115,125.90 × 61,054.60
  4. Step 4: Simplify right side
    76,822.60x = 7,028,965,774.14
  5. Step 5: Solve for x
    x = 7,028,965,774.14/76,822.60
  6. Step 6: Final answer
    x = 91,496.07

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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.