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Finding the Fourth Proportional to 51,251.80, 76,877.70 and 45,722.20

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Solution

The fourth proportional to 51,251.80, 76,877.70 and 45,722.20 is: 68,583.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,251.80 : 76,877.70 = 45,722.20 : x
  2. Step 2: Convert to fraction form
    51,251.80/76,877.70 = 45,722.20/x
  3. Step 3: Cross multiply
    51,251.80x = 76,877.70 × 45,722.20
  4. Step 4: Simplify right side
    51,251.80x = 3,515,017,574.94
  5. Step 5: Solve for x
    x = 3,515,017,574.94/51,251.80
  6. Step 6: Final answer
    x = 68,583.30

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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.