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Finding the Fourth Proportional to 66,550.62, 91,806.70 and 39,674.19

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Solution

The fourth proportional to 66,550.62, 91,806.70 and 39,674.19 is: 54,730.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,550.62 : 91,806.70 = 39,674.19 : x
  2. Step 2: Convert to fraction form
    66,550.62/91,806.70 = 39,674.19/x
  3. Step 3: Cross multiply
    66,550.62x = 91,806.70 × 39,674.19
  4. Step 4: Simplify right side
    66,550.62x = 3,642,356,459.07
  5. Step 5: Solve for x
    x = 3,642,356,459.07/66,550.62
  6. Step 6: Final answer
    x = 54,730.62

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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.