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Finding the Fourth Proportional to 51,022.80, 76,663.80 and 45,320.40

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Solution

The fourth proportional to 51,022.80, 76,663.80 and 45,320.40 is: 68,095.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,022.80 : 76,663.80 = 45,320.40 : x
  2. Step 2: Convert to fraction form
    51,022.80/76,663.80 = 45,320.40/x
  3. Step 3: Cross multiply
    51,022.80x = 76,663.80 × 45,320.40
  4. Step 4: Simplify right side
    51,022.80x = 3,474,434,081.52
  5. Step 5: Solve for x
    x = 3,474,434,081.52/51,022.80
  6. Step 6: Final answer
    x = 68,095.72

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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.