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Finding the Fourth Proportional to 79,239.84, 118,728 and 55,816.80

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Solution

The fourth proportional to 79,239.84, 118,728 and 55,816.80 is: 83,632.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,239.84 : 118,728 = 55,816.80 : x
  2. Step 2: Convert to fraction form
    79,239.84/118,728 = 55,816.80/x
  3. Step 3: Cross multiply
    79,239.84x = 118,728 × 55,816.80
  4. Step 4: Simplify right side
    79,239.84x = 6,627,017,030.40
  5. Step 5: Solve for x
    x = 6,627,017,030.40/79,239.84
  6. Step 6: Final answer
    x = 83,632.39

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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.