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Finding the Fourth Proportional to 71,636.80, 107,455.20 and 55,080.40

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Solution

The fourth proportional to 71,636.80, 107,455.20 and 55,080.40 is: 82,620.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,636.80 : 107,455.20 = 55,080.40 : x
  2. Step 2: Convert to fraction form
    71,636.80/107,455.20 = 55,080.40/x
  3. Step 3: Cross multiply
    71,636.80x = 107,455.20 × 55,080.40
  4. Step 4: Simplify right side
    71,636.80x = 5,918,675,398.08
  5. Step 5: Solve for x
    x = 5,918,675,398.08/71,636.80
  6. Step 6: Final answer
    x = 82,620.60

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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.