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Finding the Fourth Proportional to 86,550.40, 129,806.88 and 27,390.88

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Solution

The fourth proportional to 86,550.40, 129,806.88 and 27,390.88 is: 41,080.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,550.40 : 129,806.88 = 27,390.88 : x
  2. Step 2: Convert to fraction form
    86,550.40/129,806.88 = 27,390.88/x
  3. Step 3: Cross multiply
    86,550.40x = 129,806.88 × 27,390.88
  4. Step 4: Simplify right side
    86,550.40x = 3,555,524,673.25
  5. Step 5: Solve for x
    x = 3,555,524,673.25/86,550.40
  6. Step 6: Final answer
    x = 41,080.40

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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.