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Finding the Fourth Proportional to 54,471.60, 81,688.20 and 19,412.40

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Solution

The fourth proportional to 54,471.60, 81,688.20 and 19,412.40 is: 29,111.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,471.60 : 81,688.20 = 19,412.40 : x
  2. Step 2: Convert to fraction form
    54,471.60/81,688.20 = 19,412.40/x
  3. Step 3: Cross multiply
    54,471.60x = 81,688.20 × 19,412.40
  4. Step 4: Simplify right side
    54,471.60x = 1,585,764,013.68
  5. Step 5: Solve for x
    x = 1,585,764,013.68/54,471.60
  6. Step 6: Final answer
    x = 29,111.76

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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.