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Finding the Fourth Proportional to 66,400.84, 91,630.48 and 36,185.51

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Solution

The fourth proportional to 66,400.84, 91,630.48 and 36,185.51 is: 49,934.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,400.84 : 91,630.48 = 36,185.51 : x
  2. Step 2: Convert to fraction form
    66,400.84/91,630.48 = 36,185.51/x
  3. Step 3: Cross multiply
    66,400.84x = 91,630.48 × 36,185.51
  4. Step 4: Simplify right side
    66,400.84x = 3,315,695,011.26
  5. Step 5: Solve for x
    x = 3,315,695,011.26/66,400.84
  6. Step 6: Final answer
    x = 49,934.54

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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.