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Finding the Fourth Proportional to 85,980.26, 129,041.46 and 43,891.44

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Solution

The fourth proportional to 85,980.26, 129,041.46 and 43,891.44 is: 65,873.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,980.26 : 129,041.46 = 43,891.44 : x
  2. Step 2: Convert to fraction form
    85,980.26/129,041.46 = 43,891.44/x
  3. Step 3: Cross multiply
    85,980.26x = 129,041.46 × 43,891.44
  4. Step 4: Simplify right side
    85,980.26x = 5,663,815,499.10
  5. Step 5: Solve for x
    x = 5,663,815,499.10/85,980.26
  6. Step 6: Final answer
    x = 65,873.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.