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Finding the Fourth Proportional to 86,779.64, 130,167 and 27,618.84

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Solution

The fourth proportional to 86,779.64, 130,167 and 27,618.84 is: 41,427.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,779.64 : 130,167 = 27,618.84 : x
  2. Step 2: Convert to fraction form
    86,779.64/130,167 = 27,618.84/x
  3. Step 3: Cross multiply
    86,779.64x = 130,167 × 27,618.84
  4. Step 4: Simplify right side
    86,779.64x = 3,595,061,546.28
  5. Step 5: Solve for x
    x = 3,595,061,546.28/86,779.64
  6. Step 6: Final answer
    x = 41,427.48

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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.