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Finding the Fourth Proportional to 142,992.20, 214,661.10 and 79,862.60

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Solution

The fourth proportional to 142,992.20, 214,661.10 and 79,862.60 is: 119,890.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,992.20 : 214,661.10 = 79,862.60 : x
  2. Step 2: Convert to fraction form
    142,992.20/214,661.10 = 79,862.60/x
  3. Step 3: Cross multiply
    142,992.20x = 214,661.10 × 79,862.60
  4. Step 4: Simplify right side
    142,992.20x = 17,143,393,564.86
  5. Step 5: Solve for x
    x = 17,143,393,564.86/142,992.20
  6. Step 6: Final answer
    x = 119,890.41

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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.