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Finding the Fourth Proportional to 76,874.40, 115,311.60 and 21,470.40

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Solution

The fourth proportional to 76,874.40, 115,311.60 and 21,470.40 is: 32,205.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,874.40 : 115,311.60 = 21,470.40 : x
  2. Step 2: Convert to fraction form
    76,874.40/115,311.60 = 21,470.40/x
  3. Step 3: Cross multiply
    76,874.40x = 115,311.60 × 21,470.40
  4. Step 4: Simplify right side
    76,874.40x = 2,475,786,176.64
  5. Step 5: Solve for x
    x = 2,475,786,176.64/76,874.40
  6. Step 6: Final answer
    x = 32,205.60

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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.