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Finding the Fourth Proportional to 66,429.66, 91,670.79 and 36,214.50

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Solution

The fourth proportional to 66,429.66, 91,670.79 and 36,214.50 is: 49,974.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,429.66 : 91,670.79 = 36,214.50 : x
  2. Step 2: Convert to fraction form
    66,429.66/91,670.79 = 36,214.50/x
  3. Step 3: Cross multiply
    66,429.66x = 91,670.79 × 36,214.50
  4. Step 4: Simplify right side
    66,429.66x = 3,319,811,824.46
  5. Step 5: Solve for x
    x = 3,319,811,824.46/66,429.66
  6. Step 6: Final answer
    x = 49,974.84

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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.