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Finding the Fourth Proportional to 66,375.70, 99,323.90 and 57,127.28

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Solution

The fourth proportional to 66,375.70, 99,323.90 and 57,127.28 is: 85,484.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,375.70 : 99,323.90 = 57,127.28 : x
  2. Step 2: Convert to fraction form
    66,375.70/99,323.90 = 57,127.28/x
  3. Step 3: Cross multiply
    66,375.70x = 99,323.90 × 57,127.28
  4. Step 4: Simplify right side
    66,375.70x = 5,674,104,245.99
  5. Step 5: Solve for x
    x = 5,674,104,245.99/66,375.70
  6. Step 6: Final answer
    x = 85,484.66

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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.