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Finding the Fourth Proportional to 66,602.56, 91,909.98 and 36,388

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Solution

The fourth proportional to 66,602.56, 91,909.98 and 36,388 is: 50,214.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,602.56 : 91,909.98 = 36,388 : x
  2. Step 2: Convert to fraction form
    66,602.56/91,909.98 = 36,388/x
  3. Step 3: Cross multiply
    66,602.56x = 91,909.98 × 36,388
  4. Step 4: Simplify right side
    66,602.56x = 3,344,420,352.24
  5. Step 5: Solve for x
    x = 3,344,420,352.24/66,602.56
  6. Step 6: Final answer
    x = 50,214.59

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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.