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Finding the Fourth Proportional to 135,663.75, 187,215.98 and 75,243.65

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Solution

The fourth proportional to 135,663.75, 187,215.98 and 75,243.65 is: 103,836.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,663.75 : 187,215.98 = 75,243.65 : x
  2. Step 2: Convert to fraction form
    135,663.75/187,215.98 = 75,243.65/x
  3. Step 3: Cross multiply
    135,663.75x = 187,215.98 × 75,243.65
  4. Step 4: Simplify right side
    135,663.75x = 14,086,812,361.23
  5. Step 5: Solve for x
    x = 14,086,812,361.23/135,663.75
  6. Step 6: Final answer
    x = 103,836.23

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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.