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Finding the Fourth Proportional to 73,205.60, 109,808.40 and 20,616.80

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Solution

The fourth proportional to 73,205.60, 109,808.40 and 20,616.80 is: 30,925.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,205.60 : 109,808.40 = 20,616.80 : x
  2. Step 2: Convert to fraction form
    73,205.60/109,808.40 = 20,616.80/x
  3. Step 3: Cross multiply
    73,205.60x = 109,808.40 × 20,616.80
  4. Step 4: Simplify right side
    73,205.60x = 2,263,897,821.12
  5. Step 5: Solve for x
    x = 2,263,897,821.12/73,205.60
  6. Step 6: Final answer
    x = 30,925.20

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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.