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Finding the Fourth Proportional to 66,565.80, 99,719.10 and 36,930.60

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Solution

The fourth proportional to 66,565.80, 99,719.10 and 36,930.60 is: 55,324.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,565.80 : 99,719.10 = 36,930.60 : x
  2. Step 2: Convert to fraction form
    66,565.80/99,719.10 = 36,930.60/x
  3. Step 3: Cross multiply
    66,565.80x = 99,719.10 × 36,930.60
  4. Step 4: Simplify right side
    66,565.80x = 3,682,686,194.46
  5. Step 5: Solve for x
    x = 3,682,686,194.46/66,565.80
  6. Step 6: Final answer
    x = 55,324.00

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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.