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Finding the Fourth Proportional to 71,719.60, 107,579.40 and 51,905.20

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Solution

The fourth proportional to 71,719.60, 107,579.40 and 51,905.20 is: 77,857.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,719.60 : 107,579.40 = 51,905.20 : x
  2. Step 2: Convert to fraction form
    71,719.60/107,579.40 = 51,905.20/x
  3. Step 3: Cross multiply
    71,719.60x = 107,579.40 × 51,905.20
  4. Step 4: Simplify right side
    71,719.60x = 5,583,930,272.88
  5. Step 5: Solve for x
    x = 5,583,930,272.88/71,719.60
  6. Step 6: Final answer
    x = 77,857.80

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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.