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Finding the Fourth Proportional to 78,668.70, 108,312.03 and 73,303.26

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Solution

The fourth proportional to 78,668.70, 108,312.03 and 73,303.26 is: 100,924.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,668.70 : 108,312.03 = 73,303.26 : x
  2. Step 2: Convert to fraction form
    78,668.70/108,312.03 = 73,303.26/x
  3. Step 3: Cross multiply
    78,668.70x = 108,312.03 × 73,303.26
  4. Step 4: Simplify right side
    78,668.70x = 7,939,624,896.22
  5. Step 5: Solve for x
    x = 7,939,624,896.22/78,668.70
  6. Step 6: Final answer
    x = 100,924.83

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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.