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Finding the Fourth Proportional to 54,406.40, 81,609.60 and 19,385.60

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Solution

The fourth proportional to 54,406.40, 81,609.60 and 19,385.60 is: 29,078.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,406.40 : 81,609.60 = 19,385.60 : x
  2. Step 2: Convert to fraction form
    54,406.40/81,609.60 = 19,385.60/x
  3. Step 3: Cross multiply
    54,406.40x = 81,609.60 × 19,385.60
  4. Step 4: Simplify right side
    54,406.40x = 1,582,051,061.76
  5. Step 5: Solve for x
    x = 1,582,051,061.76/54,406.40
  6. Step 6: Final answer
    x = 29,078.40

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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.