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Finding the Fourth Proportional to 66,606.84, 91,918.08 and 36,391.32

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Solution

The fourth proportional to 66,606.84, 91,918.08 and 36,391.32 is: 50,220.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,606.84 : 91,918.08 = 36,391.32 : x
  2. Step 2: Convert to fraction form
    66,606.84/91,918.08 = 36,391.32/x
  3. Step 3: Cross multiply
    66,606.84x = 91,918.08 × 36,391.32
  4. Step 4: Simplify right side
    66,606.84x = 3,345,020,263.07
  5. Step 5: Solve for x
    x = 3,345,020,263.07/66,606.84
  6. Step 6: Final answer
    x = 50,220.37

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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.