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Finding the Fourth Proportional to 78,816.70, 118,032.81 and 41,408.11

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Solution

The fourth proportional to 78,816.70, 118,032.81 and 41,408.11 is: 62,011.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,816.70 : 118,032.81 = 41,408.11 : x
  2. Step 2: Convert to fraction form
    78,816.70/118,032.81 = 41,408.11/x
  3. Step 3: Cross multiply
    78,816.70x = 118,032.81 × 41,408.11
  4. Step 4: Simplify right side
    78,816.70x = 4,887,515,580.09
  5. Step 5: Solve for x
    x = 4,887,515,580.09/78,816.70
  6. Step 6: Final answer
    x = 62,011.17

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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.