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Finding the Fourth Proportional to 68,751.20, 102,925.20 and 51,298.40

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Solution

The fourth proportional to 68,751.20, 102,925.20 and 51,298.40 is: 76,797.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,751.20 : 102,925.20 = 51,298.40 : x
  2. Step 2: Convert to fraction form
    68,751.20/102,925.20 = 51,298.40/x
  3. Step 3: Cross multiply
    68,751.20x = 102,925.20 × 51,298.40
  4. Step 4: Simplify right side
    68,751.20x = 5,279,898,079.68
  5. Step 5: Solve for x
    x = 5,279,898,079.68/68,751.20
  6. Step 6: Final answer
    x = 76,797.18

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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.