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Finding the Fourth Proportional to 51,269.80, 76,904.70 and 45,740.20

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Solution

The fourth proportional to 51,269.80, 76,904.70 and 45,740.20 is: 68,610.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,269.80 : 76,904.70 = 45,740.20 : x
  2. Step 2: Convert to fraction form
    51,269.80/76,904.70 = 45,740.20/x
  3. Step 3: Cross multiply
    51,269.80x = 76,904.70 × 45,740.20
  4. Step 4: Simplify right side
    51,269.80x = 3,517,636,358.94
  5. Step 5: Solve for x
    x = 3,517,636,358.94/51,269.80
  6. Step 6: Final answer
    x = 68,610.30

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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.