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Finding the Fourth Proportional to 66,414.20, 99,675.70 and 65,895.80

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Solution

The fourth proportional to 66,414.20, 99,675.70 and 65,895.80 is: 98,897.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,414.20 : 99,675.70 = 65,895.80 : x
  2. Step 2: Convert to fraction form
    66,414.20/99,675.70 = 65,895.80/x
  3. Step 3: Cross multiply
    66,414.20x = 99,675.70 × 65,895.80
  4. Step 4: Simplify right side
    66,414.20x = 6,568,209,992.06
  5. Step 5: Solve for x
    x = 6,568,209,992.06/66,414.20
  6. Step 6: Final answer
    x = 98,897.68

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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.