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Finding the Fourth Proportional to 86,799.60, 130,199.40 and 27,639.90

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Solution

The fourth proportional to 86,799.60, 130,199.40 and 27,639.90 is: 41,459.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,799.60 : 130,199.40 = 27,639.90 : x
  2. Step 2: Convert to fraction form
    86,799.60/130,199.40 = 27,639.90/x
  3. Step 3: Cross multiply
    86,799.60x = 130,199.40 × 27,639.90
  4. Step 4: Simplify right side
    86,799.60x = 3,598,698,396.06
  5. Step 5: Solve for x
    x = 3,598,698,396.06/86,799.60
  6. Step 6: Final answer
    x = 41,459.85

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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.