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Finding the Fourth Proportional to 66,471.21, 91,764.13 and 51,329.88

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Solution

The fourth proportional to 66,471.21, 91,764.13 and 51,329.88 is: 70,861.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,471.21 : 91,764.13 = 51,329.88 : x
  2. Step 2: Convert to fraction form
    66,471.21/91,764.13 = 51,329.88/x
  3. Step 3: Cross multiply
    66,471.21x = 91,764.13 × 51,329.88
  4. Step 4: Simplify right side
    66,471.21x = 4,710,241,418.85
  5. Step 5: Solve for x
    x = 4,710,241,418.85/66,471.21
  6. Step 6: Final answer
    x = 70,861.38

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1.5x scale

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.