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Finding the Fourth Proportional to 76,990.74, 115,486.02 and 56,063.94

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Solution

The fourth proportional to 76,990.74, 115,486.02 and 56,063.94 is: 84,095.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,990.74 : 115,486.02 = 56,063.94 : x
  2. Step 2: Convert to fraction form
    76,990.74/115,486.02 = 56,063.94/x
  3. Step 3: Cross multiply
    76,990.74x = 115,486.02 × 56,063.94
  4. Step 4: Simplify right side
    76,990.74x = 6,474,601,296.12
  5. Step 5: Solve for x
    x = 6,474,601,296.12/76,990.74
  6. Step 6: Final answer
    x = 84,095.84

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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.