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Finding the Fourth Proportional to 78,806.34, 118,051.59 and 74,666.97

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Solution

The fourth proportional to 78,806.34, 118,051.59 and 74,666.97 is: 111,850.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,806.34 : 118,051.59 = 74,666.97 : x
  2. Step 2: Convert to fraction form
    78,806.34/118,051.59 = 74,666.97/x
  3. Step 3: Cross multiply
    78,806.34x = 118,051.59 × 74,666.97
  4. Step 4: Simplify right side
    78,806.34x = 8,814,554,528.98
  5. Step 5: Solve for x
    x = 8,814,554,528.98/78,806.34
  6. Step 6: Final answer
    x = 111,850.83

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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.