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Finding the Fourth Proportional to 63,640, 95,436 and 51,129.28

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Solution

The fourth proportional to 63,640, 95,436 and 51,129.28 is: 76,674.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,640 : 95,436 = 51,129.28 : x
  2. Step 2: Convert to fraction form
    63,640/95,436 = 51,129.28/x
  3. Step 3: Cross multiply
    63,640x = 95,436 × 51,129.28
  4. Step 4: Simplify right side
    63,640x = 4,879,573,966.08
  5. Step 5: Solve for x
    x = 4,879,573,966.08/63,640
  6. Step 6: Final answer
    x = 76,674.64

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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.