Home / 81,564.30-122,385.03-39,420.61

Finding the Fourth Proportional to 81,564.30, 122,385.03 and 39,420.61

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Solution

The fourth proportional to 81,564.30, 122,385.03 and 39,420.61 is: 59,149.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,564.30 : 122,385.03 = 39,420.61 : x
  2. Step 2: Convert to fraction form
    81,564.30/122,385.03 = 39,420.61/x
  3. Step 3: Cross multiply
    81,564.30x = 122,385.03 × 39,420.61
  4. Step 4: Simplify right side
    81,564.30x = 4,824,492,083.68
  5. Step 5: Solve for x
    x = 4,824,492,083.68/81,564.30
  6. Step 6: Final answer
    x = 59,149.56

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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.