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Finding the Fourth Proportional to 66,213.98, 91,376.47 and 35,999.97

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Solution

The fourth proportional to 66,213.98, 91,376.47 and 35,999.97 is: 49,680.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,213.98 : 91,376.47 = 35,999.97 : x
  2. Step 2: Convert to fraction form
    66,213.98/91,376.47 = 35,999.97/x
  3. Step 3: Cross multiply
    66,213.98x = 91,376.47 × 35,999.97
  4. Step 4: Simplify right side
    66,213.98x = 3,289,550,178.71
  5. Step 5: Solve for x
    x = 3,289,550,178.71/66,213.98
  6. Step 6: Final answer
    x = 49,680.60

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1.5x scale

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.