Home / 129,635.55-178,979.64-105,818.85

Finding the Fourth Proportional to 129,635.55, 178,979.64 and 105,818.85

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Solution

The fourth proportional to 129,635.55, 178,979.64 and 105,818.85 is: 146,097.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,635.55 : 178,979.64 = 105,818.85 : x
  2. Step 2: Convert to fraction form
    129,635.55/178,979.64 = 105,818.85/x
  3. Step 3: Cross multiply
    129,635.55x = 178,979.64 × 105,818.85
  4. Step 4: Simplify right side
    129,635.55x = 18,939,419,678.21
  5. Step 5: Solve for x
    x = 18,939,419,678.21/129,635.55
  6. Step 6: Final answer
    x = 146,097.42

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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.