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Finding the Fourth Proportional to 66,458, 91,710.78 and 36,243.56

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Solution

The fourth proportional to 66,458, 91,710.78 and 36,243.56 is: 50,015.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,458 : 91,710.78 = 36,243.56 : x
  2. Step 2: Convert to fraction form
    66,458/91,710.78 = 36,243.56/x
  3. Step 3: Cross multiply
    66,458x = 91,710.78 × 36,243.56
  4. Step 4: Simplify right side
    66,458x = 3,323,925,157.58
  5. Step 5: Solve for x
    x = 3,323,925,157.58/66,458
  6. Step 6: Final answer
    x = 50,015.43

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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.