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Finding the Fourth Proportional to 54,145.80, 81,218.70 and 19,080.90

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Solution

The fourth proportional to 54,145.80, 81,218.70 and 19,080.90 is: 28,621.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,145.80 : 81,218.70 = 19,080.90 : x
  2. Step 2: Convert to fraction form
    54,145.80/81,218.70 = 19,080.90/x
  3. Step 3: Cross multiply
    54,145.80x = 81,218.70 × 19,080.90
  4. Step 4: Simplify right side
    54,145.80x = 1,549,725,892.83
  5. Step 5: Solve for x
    x = 1,549,725,892.83/54,145.80
  6. Step 6: Final answer
    x = 28,621.35

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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.