Home / 66,577.06-91,876.10-39,720.70

Finding the Fourth Proportional to 66,577.06, 91,876.10 and 39,720.70

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Solution

The fourth proportional to 66,577.06, 91,876.10 and 39,720.70 is: 54,814.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,577.06 : 91,876.10 = 39,720.70 : x
  2. Step 2: Convert to fraction form
    66,577.06/91,876.10 = 39,720.70/x
  3. Step 3: Cross multiply
    66,577.06x = 91,876.10 × 39,720.70
  4. Step 4: Simplify right side
    66,577.06x = 3,649,383,005.27
  5. Step 5: Solve for x
    x = 3,649,383,005.27/66,577.06
  6. Step 6: Final answer
    x = 54,814.42

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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.