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Finding the Fourth Proportional to 142,806.40, 213,999 and 79,539.37

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Solution

The fourth proportional to 142,806.40, 213,999 and 79,539.37 is: 119,191.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,806.40 : 213,999 = 79,539.37 : x
  2. Step 2: Convert to fraction form
    142,806.40/213,999 = 79,539.37/x
  3. Step 3: Cross multiply
    142,806.40x = 213,999 × 79,539.37
  4. Step 4: Simplify right side
    142,806.40x = 17,021,345,640.63
  5. Step 5: Solve for x
    x = 17,021,345,640.63/142,806.40
  6. Step 6: Final answer
    x = 119,191.76

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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.