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Finding the Fourth Proportional to 208,206.40, 312,309.60 and 89,795.20

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Solution

The fourth proportional to 208,206.40, 312,309.60 and 89,795.20 is: 134,692.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,206.40 : 312,309.60 = 89,795.20 : x
  2. Step 2: Convert to fraction form
    208,206.40/312,309.60 = 89,795.20/x
  3. Step 3: Cross multiply
    208,206.40x = 312,309.60 × 89,795.20
  4. Step 4: Simplify right side
    208,206.40x = 28,043,902,993.92
  5. Step 5: Solve for x
    x = 28,043,902,993.92/208,206.40
  6. Step 6: Final answer
    x = 134,692.80

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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.