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Finding the Fourth Proportional to 272,570, 408,858.68 and 85,581.52

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Solution

The fourth proportional to 272,570, 408,858.68 and 85,581.52 is: 128,373.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,570 : 408,858.68 = 85,581.52 : x
  2. Step 2: Convert to fraction form
    272,570/408,858.68 = 85,581.52/x
  3. Step 3: Cross multiply
    272,570x = 408,858.68 × 85,581.52
  4. Step 4: Simplify right side
    272,570x = 34,990,747,299.59
  5. Step 5: Solve for x
    x = 34,990,747,299.59/272,570
  6. Step 6: Final answer
    x = 128,373.44

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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.