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Finding the Fourth Proportional to 272,814.80, 409,222.20 and 85,883.60

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Solution

The fourth proportional to 272,814.80, 409,222.20 and 85,883.60 is: 128,825.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,814.80 : 409,222.20 = 85,883.60 : x
  2. Step 2: Convert to fraction form
    272,814.80/409,222.20 = 85,883.60/x
  3. Step 3: Cross multiply
    272,814.80x = 409,222.20 × 85,883.60
  4. Step 4: Simplify right side
    272,814.80x = 35,145,475,735.92
  5. Step 5: Solve for x
    x = 35,145,475,735.92/272,814.80
  6. Step 6: Final answer
    x = 128,825.40

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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.