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Finding the Fourth Proportional to 111,379.68, 153,704.16 and 61,079.04

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Solution

The fourth proportional to 111,379.68, 153,704.16 and 61,079.04 is: 84,289.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,379.68 : 153,704.16 = 61,079.04 : x
  2. Step 2: Convert to fraction form
    111,379.68/153,704.16 = 61,079.04/x
  3. Step 3: Cross multiply
    111,379.68x = 153,704.16 × 61,079.04
  4. Step 4: Simplify right side
    111,379.68x = 9,388,102,536.81
  5. Step 5: Solve for x
    x = 9,388,102,536.81/111,379.68
  6. Step 6: Final answer
    x = 84,289.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.