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Finding the Fourth Proportional to 78,828.21, 118,238.99 and 36,693.81

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Solution

The fourth proportional to 78,828.21, 118,238.99 and 36,693.81 is: 55,039.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,828.21 : 118,238.99 = 36,693.81 : x
  2. Step 2: Convert to fraction form
    78,828.21/118,238.99 = 36,693.81/x
  3. Step 3: Cross multiply
    78,828.21x = 118,238.99 × 36,693.81
  4. Step 4: Simplify right side
    78,828.21x = 4,338,638,850.18
  5. Step 5: Solve for x
    x = 4,338,638,850.18/78,828.21
  6. Step 6: Final answer
    x = 55,039.16

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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.