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Finding the Fourth Proportional to 272,377.04, 408,565.56 and 85,403.60

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Solution

The fourth proportional to 272,377.04, 408,565.56 and 85,403.60 is: 128,105.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,377.04 : 408,565.56 = 85,403.60 : x
  2. Step 2: Convert to fraction form
    272,377.04/408,565.56 = 85,403.60/x
  3. Step 3: Cross multiply
    272,377.04x = 408,565.56 × 85,403.60
  4. Step 4: Simplify right side
    272,377.04x = 34,892,969,660.02
  5. Step 5: Solve for x
    x = 34,892,969,660.02/272,377.04
  6. Step 6: Final answer
    x = 128,105.40

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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.