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Finding the Fourth Proportional to 81,763.40, 122,645.10 and 53,769.80

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Solution

The fourth proportional to 81,763.40, 122,645.10 and 53,769.80 is: 80,654.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,763.40 : 122,645.10 = 53,769.80 : x
  2. Step 2: Convert to fraction form
    81,763.40/122,645.10 = 53,769.80/x
  3. Step 3: Cross multiply
    81,763.40x = 122,645.10 × 53,769.80
  4. Step 4: Simplify right side
    81,763.40x = 6,594,602,497.98
  5. Step 5: Solve for x
    x = 6,594,602,497.98/81,763.40
  6. Step 6: Final answer
    x = 80,654.70

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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.