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Finding the Fourth Proportional to 73,279.20, 109,918.80 and 51,117.60

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Solution

The fourth proportional to 73,279.20, 109,918.80 and 51,117.60 is: 76,676.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,279.20 : 109,918.80 = 51,117.60 : x
  2. Step 2: Convert to fraction form
    73,279.20/109,918.80 = 51,117.60/x
  3. Step 3: Cross multiply
    73,279.20x = 109,918.80 × 51,117.60
  4. Step 4: Simplify right side
    73,279.20x = 5,618,785,250.88
  5. Step 5: Solve for x
    x = 5,618,785,250.88/73,279.20
  6. Step 6: Final answer
    x = 76,676.40

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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.