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Finding the Fourth Proportional to 66,432.86, 99,648.43 and 39,786.29

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Solution

The fourth proportional to 66,432.86, 99,648.43 and 39,786.29 is: 59,678.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,432.86 : 99,648.43 = 39,786.29 : x
  2. Step 2: Convert to fraction form
    66,432.86/99,648.43 = 39,786.29/x
  3. Step 3: Cross multiply
    66,432.86x = 99,648.43 × 39,786.29
  4. Step 4: Simplify right side
    66,432.86x = 3,964,641,110.00
  5. Step 5: Solve for x
    x = 3,964,641,110.00/66,432.86
  6. Step 6: Final answer
    x = 59,678.92

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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.