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Finding the Fourth Proportional to 115,665.60, 173,312.10 and 65,596.80

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Solution

The fourth proportional to 115,665.60, 173,312.10 and 65,596.80 is: 98,289.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,665.60 : 173,312.10 = 65,596.80 : x
  2. Step 2: Convert to fraction form
    115,665.60/173,312.10 = 65,596.80/x
  3. Step 3: Cross multiply
    115,665.60x = 173,312.10 × 65,596.80
  4. Step 4: Simplify right side
    115,665.60x = 11,368,719,161.28
  5. Step 5: Solve for x
    x = 11,368,719,161.28/115,665.60
  6. Step 6: Final answer
    x = 98,289.54

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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.