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Finding the Fourth Proportional to 66,418.83, 91,657.91 and 36,204.21

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Solution

The fourth proportional to 66,418.83, 91,657.91 and 36,204.21 is: 49,961.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,418.83 : 91,657.91 = 36,204.21 : x
  2. Step 2: Convert to fraction form
    66,418.83/91,657.91 = 36,204.21/x
  3. Step 3: Cross multiply
    66,418.83x = 91,657.91 × 36,204.21
  4. Step 4: Simplify right side
    66,418.83x = 3,318,402,312.31
  5. Step 5: Solve for x
    x = 3,318,402,312.31/66,418.83
  6. Step 6: Final answer
    x = 49,961.77

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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.