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Finding the Fourth Proportional to 76,469.20, 114,703.80 and 45,288.40

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Solution

The fourth proportional to 76,469.20, 114,703.80 and 45,288.40 is: 67,932.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,469.20 : 114,703.80 = 45,288.40 : x
  2. Step 2: Convert to fraction form
    76,469.20/114,703.80 = 45,288.40/x
  3. Step 3: Cross multiply
    76,469.20x = 114,703.80 × 45,288.40
  4. Step 4: Simplify right side
    76,469.20x = 5,194,751,575.92
  5. Step 5: Solve for x
    x = 5,194,751,575.92/76,469.20
  6. Step 6: Final answer
    x = 67,932.60

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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.