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Finding the Fourth Proportional to 130,668.71, 180,300.95 and 76,964.43

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Solution

The fourth proportional to 130,668.71, 180,300.95 and 76,964.43 is: 106,198.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,668.71 : 180,300.95 = 76,964.43 : x
  2. Step 2: Convert to fraction form
    130,668.71/180,300.95 = 76,964.43/x
  3. Step 3: Cross multiply
    130,668.71x = 180,300.95 × 76,964.43
  4. Step 4: Simplify right side
    130,668.71x = 13,876,759,843.86
  5. Step 5: Solve for x
    x = 13,876,759,843.86/130,668.71
  6. Step 6: Final answer
    x = 106,198.03

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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.