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Finding the Fourth Proportional to 54,755.40, 82,135.80 and 28,511.40

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Solution

The fourth proportional to 54,755.40, 82,135.80 and 28,511.40 is: 42,768.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,755.40 : 82,135.80 = 28,511.40 : x
  2. Step 2: Convert to fraction form
    54,755.40/82,135.80 = 28,511.40/x
  3. Step 3: Cross multiply
    54,755.40x = 82,135.80 × 28,511.40
  4. Step 4: Simplify right side
    54,755.40x = 2,341,806,648.12
  5. Step 5: Solve for x
    x = 2,341,806,648.12/54,755.40
  6. Step 6: Final answer
    x = 42,768.51

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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.