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Finding the Fourth Proportional to 66,206.57, 91,365.66 and 35,991.95

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Solution

The fourth proportional to 66,206.57, 91,365.66 and 35,991.95 is: 49,669.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,206.57 : 91,365.66 = 35,991.95 : x
  2. Step 2: Convert to fraction form
    66,206.57/91,365.66 = 35,991.95/x
  3. Step 3: Cross multiply
    66,206.57x = 91,365.66 × 35,991.95
  4. Step 4: Simplify right side
    66,206.57x = 3,288,427,809.61
  5. Step 5: Solve for x
    x = 3,288,427,809.61/66,206.57
  6. Step 6: Final answer
    x = 49,669.21

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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.