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Finding the Fourth Proportional to 115,916.60, 173,874.90 and 89,640.20

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Solution

The fourth proportional to 115,916.60, 173,874.90 and 89,640.20 is: 134,460.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,916.60 : 173,874.90 = 89,640.20 : x
  2. Step 2: Convert to fraction form
    115,916.60/173,874.90 = 89,640.20/x
  3. Step 3: Cross multiply
    115,916.60x = 173,874.90 × 89,640.20
  4. Step 4: Simplify right side
    115,916.60x = 15,586,180,810.98
  5. Step 5: Solve for x
    x = 15,586,180,810.98/115,916.60
  6. Step 6: Final answer
    x = 134,460.30

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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.