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Finding the Fourth Proportional to 126,041.91, 188,618.60 and 78,679.24

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Solution

The fourth proportional to 126,041.91, 188,618.60 and 78,679.24 is: 117,741.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,041.91 : 188,618.60 = 78,679.24 : x
  2. Step 2: Convert to fraction form
    126,041.91/188,618.60 = 78,679.24/x
  3. Step 3: Cross multiply
    126,041.91x = 188,618.60 × 78,679.24
  4. Step 4: Simplify right side
    126,041.91x = 14,840,368,097.86
  5. Step 5: Solve for x
    x = 14,840,368,097.86/126,041.91
  6. Step 6: Final answer
    x = 117,741.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.