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Finding the Fourth Proportional to 76,690.45, 115,054.76 and 60,954.85

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Solution

The fourth proportional to 76,690.45, 115,054.76 and 60,954.85 is: 91,447.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,690.45 : 115,054.76 = 60,954.85 : x
  2. Step 2: Convert to fraction form
    76,690.45/115,054.76 = 60,954.85/x
  3. Step 3: Cross multiply
    76,690.45x = 115,054.76 × 60,954.85
  4. Step 4: Simplify right side
    76,690.45x = 7,013,145,332.81
  5. Step 5: Solve for x
    x = 7,013,145,332.81/76,690.45
  6. Step 6: Final answer
    x = 91,447.44

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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.