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Finding the Fourth Proportional to 86,646.56, 129,974.43 and 27,486.78

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Solution

The fourth proportional to 86,646.56, 129,974.43 and 27,486.78 is: 41,231.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,646.56 : 129,974.43 = 27,486.78 : x
  2. Step 2: Convert to fraction form
    86,646.56/129,974.43 = 27,486.78/x
  3. Step 3: Cross multiply
    86,646.56x = 129,974.43 × 27,486.78
  4. Step 4: Simplify right side
    86,646.56x = 3,572,578,563.04
  5. Step 5: Solve for x
    x = 3,572,578,563.04/86,646.56
  6. Step 6: Final answer
    x = 41,231.63

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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.