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Finding the Fourth Proportional to 272,808.80, 409,213.20 and 85,877.60

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Solution

The fourth proportional to 272,808.80, 409,213.20 and 85,877.60 is: 128,816.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,808.80 : 409,213.20 = 85,877.60 : x
  2. Step 2: Convert to fraction form
    272,808.80/409,213.20 = 85,877.60/x
  3. Step 3: Cross multiply
    272,808.80x = 409,213.20 × 85,877.60
  4. Step 4: Simplify right side
    272,808.80x = 35,142,247,504.32
  5. Step 5: Solve for x
    x = 35,142,247,504.32/272,808.80
  6. Step 6: Final answer
    x = 128,816.40

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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.