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Finding the Fourth Proportional to 66,432.83, 91,679.49 and 39,571.65

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Solution

The fourth proportional to 66,432.83, 91,679.49 and 39,571.65 is: 54,610.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,432.83 : 91,679.49 = 39,571.65 : x
  2. Step 2: Convert to fraction form
    66,432.83/91,679.49 = 39,571.65/x
  3. Step 3: Cross multiply
    66,432.83x = 91,679.49 × 39,571.65
  4. Step 4: Simplify right side
    66,432.83x = 3,627,908,690.46
  5. Step 5: Solve for x
    x = 3,627,908,690.46/66,432.83
  6. Step 6: Final answer
    x = 54,610.18

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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.