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Finding the Fourth Proportional to 129,609.63, 178,861.28 and 69,993.63

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Solution

The fourth proportional to 129,609.63, 178,861.28 and 69,993.63 is: 96,591.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,609.63 : 178,861.28 = 69,993.63 : x
  2. Step 2: Convert to fraction form
    129,609.63/178,861.28 = 69,993.63/x
  3. Step 3: Cross multiply
    129,609.63x = 178,861.28 × 69,993.63
  4. Step 4: Simplify right side
    129,609.63x = 12,519,149,534.32
  5. Step 5: Solve for x
    x = 12,519,149,534.32/129,609.63
  6. Step 6: Final answer
    x = 96,591.20

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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.