Home / 81,000.89-111,781.30-45,190.91

Finding the Fourth Proportional to 81,000.89, 111,781.30 and 45,190.91

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Solution

The fourth proportional to 81,000.89, 111,781.30 and 45,190.91 is: 62,363.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000.89 : 111,781.30 = 45,190.91 : x
  2. Step 2: Convert to fraction form
    81,000.89/111,781.30 = 45,190.91/x
  3. Step 3: Cross multiply
    81,000.89x = 111,781.30 × 45,190.91
  4. Step 4: Simplify right side
    81,000.89x = 5,051,498,584.75
  5. Step 5: Solve for x
    x = 5,051,498,584.75/81,000.89
  6. Step 6: Final answer
    x = 62,363.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.