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Finding the Fourth Proportional to 51,308.70, 76,963.05 and 40,940.70

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Solution

The fourth proportional to 51,308.70, 76,963.05 and 40,940.70 is: 61,411.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,308.70 : 76,963.05 = 40,940.70 : x
  2. Step 2: Convert to fraction form
    51,308.70/76,963.05 = 40,940.70/x
  3. Step 3: Cross multiply
    51,308.70x = 76,963.05 × 40,940.70
  4. Step 4: Simplify right side
    51,308.70x = 3,150,921,141.14
  5. Step 5: Solve for x
    x = 3,150,921,141.14/51,308.70
  6. Step 6: Final answer
    x = 61,411.05

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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.