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Finding the Fourth Proportional to 272,821.80, 409,232.70 and 85,890.60

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Solution

The fourth proportional to 272,821.80, 409,232.70 and 85,890.60 is: 128,835.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,821.80 : 409,232.70 = 85,890.60 : x
  2. Step 2: Convert to fraction form
    272,821.80/409,232.70 = 85,890.60/x
  3. Step 3: Cross multiply
    272,821.80x = 409,232.70 × 85,890.60
  4. Step 4: Simplify right side
    272,821.80x = 35,149,242,142.62
  5. Step 5: Solve for x
    x = 35,149,242,142.62/272,821.80
  6. Step 6: Final answer
    x = 128,835.90

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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.