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Finding the Fourth Proportional to 115,853.36, 173,789.76 and 36,978.80

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Solution

The fourth proportional to 115,853.36, 173,789.76 and 36,978.80 is: 55,471.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,853.36 : 173,789.76 = 36,978.80 : x
  2. Step 2: Convert to fraction form
    115,853.36/173,789.76 = 36,978.80/x
  3. Step 3: Cross multiply
    115,853.36x = 173,789.76 × 36,978.80
  4. Step 4: Simplify right side
    115,853.36x = 6,426,536,777.09
  5. Step 5: Solve for x
    x = 6,426,536,777.09/115,853.36
  6. Step 6: Final answer
    x = 55,471.30

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1.5x scale

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.