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Finding the Fourth Proportional to 81,136.74, 111,958.03 and 45,320.97

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Solution

The fourth proportional to 81,136.74, 111,958.03 and 45,320.97 is: 62,536.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,136.74 : 111,958.03 = 45,320.97 : x
  2. Step 2: Convert to fraction form
    81,136.74/111,958.03 = 45,320.97/x
  3. Step 3: Cross multiply
    81,136.74x = 111,958.03 × 45,320.97
  4. Step 4: Simplify right side
    81,136.74x = 5,074,046,518.89
  5. Step 5: Solve for x
    x = 5,074,046,518.89/81,136.74
  6. Step 6: Final answer
    x = 62,536.98

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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.