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Finding the Fourth Proportional to 66,907.86, 100,368 and 47,753.79

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Solution

The fourth proportional to 66,907.86, 100,368 and 47,753.79 is: 71,635.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,907.86 : 100,368 = 47,753.79 : x
  2. Step 2: Convert to fraction form
    66,907.86/100,368 = 47,753.79/x
  3. Step 3: Cross multiply
    66,907.86x = 100,368 × 47,753.79
  4. Step 4: Simplify right side
    66,907.86x = 4,792,952,394.72
  5. Step 5: Solve for x
    x = 4,792,952,394.72/66,907.86
  6. Step 6: Final answer
    x = 71,635.12

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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.