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Finding the Fourth Proportional to 54,159.40, 81,239.10 and 53,813.80

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Solution

The fourth proportional to 54,159.40, 81,239.10 and 53,813.80 is: 80,720.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,159.40 : 81,239.10 = 53,813.80 : x
  2. Step 2: Convert to fraction form
    54,159.40/81,239.10 = 53,813.80/x
  3. Step 3: Cross multiply
    54,159.40x = 81,239.10 × 53,813.80
  4. Step 4: Simplify right side
    54,159.40x = 4,371,784,679.58
  5. Step 5: Solve for x
    x = 4,371,784,679.58/54,159.40
  6. Step 6: Final answer
    x = 80,720.70

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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.