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Finding the Fourth Proportional to 73,211.60, 109,817.40 and 20,620.40

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Solution

The fourth proportional to 73,211.60, 109,817.40 and 20,620.40 is: 30,930.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,211.60 : 109,817.40 = 20,620.40 : x
  2. Step 2: Convert to fraction form
    73,211.60/109,817.40 = 20,620.40/x
  3. Step 3: Cross multiply
    73,211.60x = 109,817.40 × 20,620.40
  4. Step 4: Simplify right side
    73,211.60x = 2,264,478,714.96
  5. Step 5: Solve for x
    x = 2,264,478,714.96/73,211.60
  6. Step 6: Final answer
    x = 30,930.60

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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.