Home / 86,428.85-129,643.25-27,270.50

Finding the Fourth Proportional to 86,428.85, 129,643.25 and 27,270.50

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Solution

The fourth proportional to 86,428.85, 129,643.25 and 27,270.50 is: 40,905.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,428.85 : 129,643.25 = 27,270.50 : x
  2. Step 2: Convert to fraction form
    86,428.85/129,643.25 = 27,270.50/x
  3. Step 3: Cross multiply
    86,428.85x = 129,643.25 × 27,270.50
  4. Step 4: Simplify right side
    86,428.85x = 3,535,435,464.56
  5. Step 5: Solve for x
    x = 3,535,435,464.56/86,428.85
  6. Step 6: Final answer
    x = 40,905.74

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Similar ratio
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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.