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Finding the Fourth Proportional to 272,857.20, 409,330.60 and 85,823.60

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Solution

The fourth proportional to 272,857.20, 409,330.60 and 85,823.60 is: 128,749.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,857.20 : 409,330.60 = 85,823.60 : x
  2. Step 2: Convert to fraction form
    272,857.20/409,330.60 = 85,823.60/x
  3. Step 3: Cross multiply
    272,857.20x = 409,330.60 × 85,823.60
  4. Step 4: Simplify right side
    272,857.20x = 35,130,225,682.16
  5. Step 5: Solve for x
    x = 35,130,225,682.16/272,857.20
  6. Step 6: Final answer
    x = 128,749.49

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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.