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Finding the Fourth Proportional to 66,046.88, 91,140.24 and 36,240.80

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Solution

The fourth proportional to 66,046.88, 91,140.24 and 36,240.80 is: 50,009.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,046.88 : 91,140.24 = 36,240.80 : x
  2. Step 2: Convert to fraction form
    66,046.88/91,140.24 = 36,240.80/x
  3. Step 3: Cross multiply
    66,046.88x = 91,140.24 × 36,240.80
  4. Step 4: Simplify right side
    66,046.88x = 3,302,995,209.79
  5. Step 5: Solve for x
    x = 3,302,995,209.79/66,046.88
  6. Step 6: Final answer
    x = 50,009.86

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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.