Home / 54,190.11-81,276.78-20,905.32

Finding the Fourth Proportional to 54,190.11, 81,276.78 and 20,905.32

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Solution

The fourth proportional to 54,190.11, 81,276.78 and 20,905.32 is: 31,354.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,190.11 : 81,276.78 = 20,905.32 : x
  2. Step 2: Convert to fraction form
    54,190.11/81,276.78 = 20,905.32/x
  3. Step 3: Cross multiply
    54,190.11x = 81,276.78 × 20,905.32
  4. Step 4: Simplify right side
    54,190.11x = 1,699,117,094.47
  5. Step 5: Solve for x
    x = 1,699,117,094.47/54,190.11
  6. Step 6: Final answer
    x = 31,354.75

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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.