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Finding the Fourth Proportional to 272,379.04, 408,568.56 and 85,405.60

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Solution

The fourth proportional to 272,379.04, 408,568.56 and 85,405.60 is: 128,108.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,379.04 : 408,568.56 = 85,405.60 : x
  2. Step 2: Convert to fraction form
    272,379.04/408,568.56 = 85,405.60/x
  3. Step 3: Cross multiply
    272,379.04x = 408,568.56 × 85,405.60
  4. Step 4: Simplify right side
    272,379.04x = 34,894,043,007.94
  5. Step 5: Solve for x
    x = 34,894,043,007.94/272,379.04
  6. Step 6: Final answer
    x = 128,108.40

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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.