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Finding the Fourth Proportional to 65,310.06, 90,128.87 and 36,636.08

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Solution

The fourth proportional to 65,310.06, 90,128.87 and 36,636.08 is: 50,558.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,310.06 : 90,128.87 = 36,636.08 : x
  2. Step 2: Convert to fraction form
    65,310.06/90,128.87 = 36,636.08/x
  3. Step 3: Cross multiply
    65,310.06x = 90,128.87 × 36,636.08
  4. Step 4: Simplify right side
    65,310.06x = 3,301,967,857.80
  5. Step 5: Solve for x
    x = 3,301,967,857.80/65,310.06
  6. Step 6: Final answer
    x = 50,558.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.