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Finding the Fourth Proportional to 89,838.30, 134,738.55 and 45,423.30

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Solution

The fourth proportional to 89,838.30, 134,738.55 and 45,423.30 is: 68,125.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,838.30 : 134,738.55 = 45,423.30 : x
  2. Step 2: Convert to fraction form
    89,838.30/134,738.55 = 45,423.30/x
  3. Step 3: Cross multiply
    89,838.30x = 134,738.55 × 45,423.30
  4. Step 4: Simplify right side
    89,838.30x = 6,120,269,578.22
  5. Step 5: Solve for x
    x = 6,120,269,578.22/89,838.30
  6. Step 6: Final answer
    x = 68,125.39

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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.