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Finding the Fourth Proportional to 86,049.68, 129,069.88 and 26,878.56

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Solution

The fourth proportional to 86,049.68, 129,069.88 and 26,878.56 is: 40,316.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,049.68 : 129,069.88 = 26,878.56 : x
  2. Step 2: Convert to fraction form
    86,049.68/129,069.88 = 26,878.56/x
  3. Step 3: Cross multiply
    86,049.68x = 129,069.88 × 26,878.56
  4. Step 4: Simplify right side
    86,049.68x = 3,469,212,513.77
  5. Step 5: Solve for x
    x = 3,469,212,513.77/86,049.68
  6. Step 6: Final answer
    x = 40,316.39

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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.