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Finding the Fourth Proportional to 205,487.66, 308,256.40 and 72,340.67

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Solution

The fourth proportional to 205,487.66, 308,256.40 and 72,340.67 is: 108,519.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,487.66 : 308,256.40 = 72,340.67 : x
  2. Step 2: Convert to fraction form
    205,487.66/308,256.40 = 72,340.67/x
  3. Step 3: Cross multiply
    205,487.66x = 308,256.40 × 72,340.67
  4. Step 4: Simplify right side
    205,487.66x = 22,299,474,507.79
  5. Step 5: Solve for x
    x = 22,299,474,507.79/205,487.66
  6. Step 6: Final answer
    x = 108,519.77

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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.