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Finding the Fourth Proportional to 76,659.72, 114,995.34 and 20,498.58

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Solution

The fourth proportional to 76,659.72, 114,995.34 and 20,498.58 is: 30,749.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,659.72 : 114,995.34 = 20,498.58 : x
  2. Step 2: Convert to fraction form
    76,659.72/114,995.34 = 20,498.58/x
  3. Step 3: Cross multiply
    76,659.72x = 114,995.34 × 20,498.58
  4. Step 4: Simplify right side
    76,659.72x = 2,357,241,176.62
  5. Step 5: Solve for x
    x = 2,357,241,176.62/76,659.72
  6. Step 6: Final answer
    x = 30,749.41

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Similar ratio
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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.