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Finding the Fourth Proportional to 66,471.43, 91,764.40 and 51,330.10

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Solution

The fourth proportional to 66,471.43, 91,764.40 and 51,330.10 is: 70,861.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,471.43 : 91,764.40 = 51,330.10 : x
  2. Step 2: Convert to fraction form
    66,471.43/91,764.40 = 51,330.10/x
  3. Step 3: Cross multiply
    66,471.43x = 91,764.40 × 51,330.10
  4. Step 4: Simplify right side
    66,471.43x = 4,710,275,241.29
  5. Step 5: Solve for x
    x = 4,710,275,241.29/66,471.43
  6. Step 6: Final answer
    x = 70,861.66

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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.