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Finding the Fourth Proportional to 111,315.49, 166,696.26 and 77,879.01

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Solution

The fourth proportional to 111,315.49, 166,696.26 and 77,879.01 is: 116,624.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,315.49 : 166,696.26 = 77,879.01 : x
  2. Step 2: Convert to fraction form
    111,315.49/166,696.26 = 77,879.01/x
  3. Step 3: Cross multiply
    111,315.49x = 166,696.26 × 77,879.01
  4. Step 4: Simplify right side
    111,315.49x = 12,982,139,699.50
  5. Step 5: Solve for x
    x = 12,982,139,699.50/111,315.49
  6. Step 6: Final answer
    x = 116,624.74

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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.