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Finding the Fourth Proportional to 208,789.50, 313,030.89 and 66,552.90

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Solution

The fourth proportional to 208,789.50, 313,030.89 and 66,552.90 is: 99,780.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,789.50 : 313,030.89 = 66,552.90 : x
  2. Step 2: Convert to fraction form
    208,789.50/313,030.89 = 66,552.90/x
  3. Step 3: Cross multiply
    208,789.50x = 313,030.89 × 66,552.90
  4. Step 4: Simplify right side
    208,789.50x = 20,833,113,519.08
  5. Step 5: Solve for x
    x = 20,833,113,519.08/208,789.50
  6. Step 6: Final answer
    x = 99,780.47

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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.