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Finding the Fourth Proportional to 272,043.60, 408,103.80 and 85,035.60

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Solution

The fourth proportional to 272,043.60, 408,103.80 and 85,035.60 is: 127,565.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,043.60 : 408,103.80 = 85,035.60 : x
  2. Step 2: Convert to fraction form
    272,043.60/408,103.80 = 85,035.60/x
  3. Step 3: Cross multiply
    272,043.60x = 408,103.80 × 85,035.60
  4. Step 4: Simplify right side
    272,043.60x = 34,703,351,495.28
  5. Step 5: Solve for x
    x = 34,703,351,495.28/272,043.60
  6. Step 6: Final answer
    x = 127,565.40

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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.