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Finding the Fourth Proportional to 168,810.80, 253,143.30 and 84,538.40

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Solution

The fourth proportional to 168,810.80, 253,143.30 and 84,538.40 is: 126,771.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,810.80 : 253,143.30 = 84,538.40 : x
  2. Step 2: Convert to fraction form
    168,810.80/253,143.30 = 84,538.40/x
  3. Step 3: Cross multiply
    168,810.80x = 253,143.30 × 84,538.40
  4. Step 4: Simplify right side
    168,810.80x = 21,400,329,552.72
  5. Step 5: Solve for x
    x = 21,400,329,552.72/168,810.80
  6. Step 6: Final answer
    x = 126,771.09

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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.