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Finding the Fourth Proportional to 272,457.92, 408,686.40 and 85,469.12

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Solution

The fourth proportional to 272,457.92, 408,686.40 and 85,469.12 is: 128,203.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,457.92 : 408,686.40 = 85,469.12 : x
  2. Step 2: Convert to fraction form
    272,457.92/408,686.40 = 85,469.12/x
  3. Step 3: Cross multiply
    272,457.92x = 408,686.40 × 85,469.12
  4. Step 4: Simplify right side
    272,457.92x = 34,930,066,963.97
  5. Step 5: Solve for x
    x = 34,930,066,963.97/272,457.92
  6. Step 6: Final answer
    x = 128,203.53

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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.