Home / 66,129-91,266.36-40,982.28

Finding the Fourth Proportional to 66,129, 91,266.36 and 40,982.28

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Solution

The fourth proportional to 66,129, 91,266.36 and 40,982.28 is: 56,560.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,129 : 91,266.36 = 40,982.28 : x
  2. Step 2: Convert to fraction form
    66,129/91,266.36 = 40,982.28/x
  3. Step 3: Cross multiply
    66,129x = 91,266.36 × 40,982.28
  4. Step 4: Simplify right side
    66,129x = 3,740,303,520.10
  5. Step 5: Solve for x
    x = 3,740,303,520.10/66,129
  6. Step 6: Final answer
    x = 56,560.71

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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.