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Finding the Fourth Proportional to 136,680.60, 188,609.88 and 79,321.60

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Solution

The fourth proportional to 136,680.60, 188,609.88 and 79,321.60 is: 109,458.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,680.60 : 188,609.88 = 79,321.60 : x
  2. Step 2: Convert to fraction form
    136,680.60/188,609.88 = 79,321.60/x
  3. Step 3: Cross multiply
    136,680.60x = 188,609.88 × 79,321.60
  4. Step 4: Simplify right side
    136,680.60x = 14,960,837,457.41
  5. Step 5: Solve for x
    x = 14,960,837,457.41/136,680.60
  6. Step 6: Final answer
    x = 109,458.38

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1.5x scale

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.