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Finding the Fourth Proportional to 205,876.40, 308,584.20 and 87,527.60

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Solution

The fourth proportional to 205,876.40, 308,584.20 and 87,527.60 is: 131,193.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,876.40 : 308,584.20 = 87,527.60 : x
  2. Step 2: Convert to fraction form
    205,876.40/308,584.20 = 87,527.60/x
  3. Step 3: Cross multiply
    205,876.40x = 308,584.20 × 87,527.60
  4. Step 4: Simplify right side
    205,876.40x = 27,009,634,423.92
  5. Step 5: Solve for x
    x = 27,009,634,423.92/205,876.40
  6. Step 6: Final answer
    x = 131,193.45

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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.