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Finding the Fourth Proportional to 72,505.26, 108,727.11 and 28,123.74

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Solution

The fourth proportional to 72,505.26, 108,727.11 and 28,123.74 is: 42,173.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,505.26 : 108,727.11 = 28,123.74 : x
  2. Step 2: Convert to fraction form
    72,505.26/108,727.11 = 28,123.74/x
  3. Step 3: Cross multiply
    72,505.26x = 108,727.11 × 28,123.74
  4. Step 4: Simplify right side
    72,505.26x = 3,057,812,972.59
  5. Step 5: Solve for x
    x = 3,057,812,972.59/72,505.26
  6. Step 6: Final answer
    x = 42,173.67

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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.