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Finding the Fourth Proportional to 273,969.60, 411,026.40 and 86,980.80

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Solution

The fourth proportional to 273,969.60, 411,026.40 and 86,980.80 is: 130,494.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,969.60 : 411,026.40 = 86,980.80 : x
  2. Step 2: Convert to fraction form
    273,969.60/411,026.40 = 86,980.80/x
  3. Step 3: Cross multiply
    273,969.60x = 411,026.40 × 86,980.80
  4. Step 4: Simplify right side
    273,969.60x = 35,751,405,093.12
  5. Step 5: Solve for x
    x = 35,751,405,093.12/273,969.60
  6. Step 6: Final answer
    x = 130,494.06

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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.