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Finding the Fourth Proportional to 77,013.60, 115,462.80 and 41,992.80

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Solution

The fourth proportional to 77,013.60, 115,462.80 and 41,992.80 is: 62,957.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,013.60 : 115,462.80 = 41,992.80 : x
  2. Step 2: Convert to fraction form
    77,013.60/115,462.80 = 41,992.80/x
  3. Step 3: Cross multiply
    77,013.60x = 115,462.80 × 41,992.80
  4. Step 4: Simplify right side
    77,013.60x = 4,848,606,267.84
  5. Step 5: Solve for x
    x = 4,848,606,267.84/77,013.60
  6. Step 6: Final answer
    x = 62,957.79

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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.