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Finding the Fourth Proportional to 54,292.80, 81,379.80 and 19,214.40

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Solution

The fourth proportional to 54,292.80, 81,379.80 and 19,214.40 is: 28,800.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,292.80 : 81,379.80 = 19,214.40 : x
  2. Step 2: Convert to fraction form
    54,292.80/81,379.80 = 19,214.40/x
  3. Step 3: Cross multiply
    54,292.80x = 81,379.80 × 19,214.40
  4. Step 4: Simplify right side
    54,292.80x = 1,563,664,029.12
  5. Step 5: Solve for x
    x = 1,563,664,029.12/54,292.80
  6. Step 6: Final answer
    x = 28,800.58

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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.