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Finding the Fourth Proportional to 68,609.20, 102,712.20 and 51,156.40

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Solution

The fourth proportional to 68,609.20, 102,712.20 and 51,156.40 is: 76,584.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,609.20 : 102,712.20 = 51,156.40 : x
  2. Step 2: Convert to fraction form
    68,609.20/102,712.20 = 51,156.40/x
  3. Step 3: Cross multiply
    68,609.20x = 102,712.20 × 51,156.40
  4. Step 4: Simplify right side
    68,609.20x = 5,254,386,388.08
  5. Step 5: Solve for x
    x = 5,254,386,388.08/68,609.20
  6. Step 6: Final answer
    x = 76,584.28

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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.