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Finding the Fourth Proportional to 272,477.90, 408,600.20 and 85,503.98

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Solution

The fourth proportional to 272,477.90, 408,600.20 and 85,503.98 is: 128,219.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,477.90 : 408,600.20 = 85,503.98 : x
  2. Step 2: Convert to fraction form
    272,477.90/408,600.20 = 85,503.98/x
  3. Step 3: Cross multiply
    272,477.90x = 408,600.20 × 85,503.98
  4. Step 4: Simplify right side
    272,477.90x = 34,936,943,328.80
  5. Step 5: Solve for x
    x = 34,936,943,328.80/272,477.90
  6. Step 6: Final answer
    x = 128,219.37

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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.