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Finding the Fourth Proportional to 119,796.96, 179,711.64 and 40,890

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Solution

The fourth proportional to 119,796.96, 179,711.64 and 40,890 is: 61,340.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,796.96 : 179,711.64 = 40,890 : x
  2. Step 2: Convert to fraction form
    119,796.96/179,711.64 = 40,890/x
  3. Step 3: Cross multiply
    119,796.96x = 179,711.64 × 40,890
  4. Step 4: Simplify right side
    119,796.96x = 7,348,408,959.60
  5. Step 5: Solve for x
    x = 7,348,408,959.60/119,796.96
  6. Step 6: Final answer
    x = 61,340.53

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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.