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Finding the Fourth Proportional to 78,857.69, 118,286.54 and 62,988.42

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Solution

The fourth proportional to 78,857.69, 118,286.54 and 62,988.42 is: 94,482.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,857.69 : 118,286.54 = 62,988.42 : x
  2. Step 2: Convert to fraction form
    78,857.69/118,286.54 = 62,988.42/x
  3. Step 3: Cross multiply
    78,857.69x = 118,286.54 × 62,988.42
  4. Step 4: Simplify right side
    78,857.69x = 7,450,682,104.40
  5. Step 5: Solve for x
    x = 7,450,682,104.40/78,857.69
  6. Step 6: Final answer
    x = 94,482.63

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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.