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Finding the Fourth Proportional to 89,059.88, 133,639 and 49,639.20

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Solution

The fourth proportional to 89,059.88, 133,639 and 49,639.20 is: 74,486.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,059.88 : 133,639 = 49,639.20 : x
  2. Step 2: Convert to fraction form
    89,059.88/133,639 = 49,639.20/x
  3. Step 3: Cross multiply
    89,059.88x = 133,639 × 49,639.20
  4. Step 4: Simplify right side
    89,059.88x = 6,633,733,048.80
  5. Step 5: Solve for x
    x = 6,633,733,048.80/89,059.88
  6. Step 6: Final answer
    x = 74,486.21

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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.