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Finding the Fourth Proportional to 68,803.20, 103,204.80 and 40,809.60

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Solution

The fourth proportional to 68,803.20, 103,204.80 and 40,809.60 is: 61,214.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,803.20 : 103,204.80 = 40,809.60 : x
  2. Step 2: Convert to fraction form
    68,803.20/103,204.80 = 40,809.60/x
  3. Step 3: Cross multiply
    68,803.20x = 103,204.80 × 40,809.60
  4. Step 4: Simplify right side
    68,803.20x = 4,211,746,606.08
  5. Step 5: Solve for x
    x = 4,211,746,606.08/68,803.20
  6. Step 6: Final answer
    x = 61,214.40

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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.