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Finding the Fourth Proportional to 54,285.40, 81,428.10 and 45,537.40

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Solution

The fourth proportional to 54,285.40, 81,428.10 and 45,537.40 is: 68,306.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,285.40 : 81,428.10 = 45,537.40 : x
  2. Step 2: Convert to fraction form
    54,285.40/81,428.10 = 45,537.40/x
  3. Step 3: Cross multiply
    54,285.40x = 81,428.10 × 45,537.40
  4. Step 4: Simplify right side
    54,285.40x = 3,708,023,960.94
  5. Step 5: Solve for x
    x = 3,708,023,960.94/54,285.40
  6. Step 6: Final answer
    x = 68,306.10

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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.