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Finding the Fourth Proportional to 91,354.97, 137,056.05 and 28,173.67

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Solution

The fourth proportional to 91,354.97, 137,056.05 and 28,173.67 is: 42,267.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,354.97 : 137,056.05 = 28,173.67 : x
  2. Step 2: Convert to fraction form
    91,354.97/137,056.05 = 28,173.67/x
  3. Step 3: Cross multiply
    91,354.97x = 137,056.05 × 28,173.67
  4. Step 4: Simplify right side
    91,354.97x = 3,861,371,581.56
  5. Step 5: Solve for x
    x = 3,861,371,581.56/91,354.97
  6. Step 6: Final answer
    x = 42,267.78

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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.