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Finding the Fourth Proportional to 111,315.99, 166,697.01 and 77,879.51

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Solution

The fourth proportional to 111,315.99, 166,697.01 and 77,879.51 is: 116,625.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,315.99 : 166,697.01 = 77,879.51 : x
  2. Step 2: Convert to fraction form
    111,315.99/166,697.01 = 77,879.51/x
  3. Step 3: Cross multiply
    111,315.99x = 166,697.01 × 77,879.51
  4. Step 4: Simplify right side
    111,315.99x = 12,982,281,457.27
  5. Step 5: Solve for x
    x = 12,982,281,457.27/111,315.99
  6. Step 6: Final answer
    x = 116,625.49

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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.