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Finding the Fourth Proportional to 66,439.65, 91,687.15 and 36,225.47

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Solution

The fourth proportional to 66,439.65, 91,687.15 and 36,225.47 is: 49,991.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,439.65 : 91,687.15 = 36,225.47 : x
  2. Step 2: Convert to fraction form
    66,439.65/91,687.15 = 36,225.47/x
  3. Step 3: Cross multiply
    66,439.65x = 91,687.15 × 36,225.47
  4. Step 4: Simplify right side
    66,439.65x = 3,321,410,101.71
  5. Step 5: Solve for x
    x = 3,321,410,101.71/66,439.65
  6. Step 6: Final answer
    x = 49,991.38

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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.