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Finding the Fourth Proportional to 54,259.80, 81,389.70 and 45,511.80

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Solution

The fourth proportional to 54,259.80, 81,389.70 and 45,511.80 is: 68,267.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,259.80 : 81,389.70 = 45,511.80 : x
  2. Step 2: Convert to fraction form
    54,259.80/81,389.70 = 45,511.80/x
  3. Step 3: Cross multiply
    54,259.80x = 81,389.70 × 45,511.80
  4. Step 4: Simplify right side
    54,259.80x = 3,704,191,748.46
  5. Step 5: Solve for x
    x = 3,704,191,748.46/54,259.80
  6. Step 6: Final answer
    x = 68,267.70

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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.