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Finding the Fourth Proportional to 107,992.80, 161,989.20 and 92,959.20

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Solution

The fourth proportional to 107,992.80, 161,989.20 and 92,959.20 is: 139,438.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,992.80 : 161,989.20 = 92,959.20 : x
  2. Step 2: Convert to fraction form
    107,992.80/161,989.20 = 92,959.20/x
  3. Step 3: Cross multiply
    107,992.80x = 161,989.20 × 92,959.20
  4. Step 4: Simplify right side
    107,992.80x = 15,058,386,440.64
  5. Step 5: Solve for x
    x = 15,058,386,440.64/107,992.80
  6. Step 6: Final answer
    x = 139,438.80

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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.