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Finding the Fourth Proportional to 272,486.70, 408,730.05 and 85,498.20

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Solution

The fourth proportional to 272,486.70, 408,730.05 and 85,498.20 is: 128,247.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,486.70 : 408,730.05 = 85,498.20 : x
  2. Step 2: Convert to fraction form
    272,486.70/408,730.05 = 85,498.20/x
  3. Step 3: Cross multiply
    272,486.70x = 408,730.05 × 85,498.20
  4. Step 4: Simplify right side
    272,486.70x = 34,945,683,560.91
  5. Step 5: Solve for x
    x = 34,945,683,560.91/272,486.70
  6. Step 6: Final answer
    x = 128,247.30

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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.