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Finding the Fourth Proportional to 54,363.60, 81,545.40 and 45,147.60

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Solution

The fourth proportional to 54,363.60, 81,545.40 and 45,147.60 is: 67,721.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,363.60 : 81,545.40 = 45,147.60 : x
  2. Step 2: Convert to fraction form
    54,363.60/81,545.40 = 45,147.60/x
  3. Step 3: Cross multiply
    54,363.60x = 81,545.40 × 45,147.60
  4. Step 4: Simplify right side
    54,363.60x = 3,681,579,101.04
  5. Step 5: Solve for x
    x = 3,681,579,101.04/54,363.60
  6. Step 6: Final answer
    x = 67,721.40

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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.