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Finding the Fourth Proportional to 89,721.30, 134,415.90 and 52,299.30

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Solution

The fourth proportional to 89,721.30, 134,415.90 and 52,299.30 is: 78,352.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,721.30 : 134,415.90 = 52,299.30 : x
  2. Step 2: Convert to fraction form
    89,721.30/134,415.90 = 52,299.30/x
  3. Step 3: Cross multiply
    89,721.30x = 134,415.90 × 52,299.30
  4. Step 4: Simplify right side
    89,721.30x = 7,029,857,478.87
  5. Step 5: Solve for x
    x = 7,029,857,478.87/89,721.30
  6. Step 6: Final answer
    x = 78,352.16

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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.