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Finding the Fourth Proportional to 54,266.40, 81,399.60 and 19,209.60

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Solution

The fourth proportional to 54,266.40, 81,399.60 and 19,209.60 is: 28,814.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,266.40 : 81,399.60 = 19,209.60 : x
  2. Step 2: Convert to fraction form
    54,266.40/81,399.60 = 19,209.60/x
  3. Step 3: Cross multiply
    54,266.40x = 81,399.60 × 19,209.60
  4. Step 4: Simplify right side
    54,266.40x = 1,563,653,756.16
  5. Step 5: Solve for x
    x = 1,563,653,756.16/54,266.40
  6. Step 6: Final answer
    x = 28,814.40

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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.