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Finding the Fourth Proportional to 208,811.40, 312,525.90 and 161,809.80

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Solution

The fourth proportional to 208,811.40, 312,525.90 and 161,809.80 is: 242,179.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,811.40 : 312,525.90 = 161,809.80 : x
  2. Step 2: Convert to fraction form
    208,811.40/312,525.90 = 161,809.80/x
  3. Step 3: Cross multiply
    208,811.40x = 312,525.90 × 161,809.80
  4. Step 4: Simplify right side
    208,811.40x = 50,569,753,373.82
  5. Step 5: Solve for x
    x = 50,569,753,373.82/208,811.40
  6. Step 6: Final answer
    x = 242,179.08

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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.