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Finding the Fourth Proportional to 54,479.40, 81,719.10 and 19,406.40

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Solution

The fourth proportional to 54,479.40, 81,719.10 and 19,406.40 is: 29,109.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,479.40 : 81,719.10 = 19,406.40 : x
  2. Step 2: Convert to fraction form
    54,479.40/81,719.10 = 19,406.40/x
  3. Step 3: Cross multiply
    54,479.40x = 81,719.10 × 19,406.40
  4. Step 4: Simplify right side
    54,479.40x = 1,585,873,542.24
  5. Step 5: Solve for x
    x = 1,585,873,542.24/54,479.40
  6. Step 6: Final answer
    x = 29,109.60

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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.