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Finding the Fourth Proportional to 79,660.40, 119,490.60 and 76,161.20

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Solution

The fourth proportional to 79,660.40, 119,490.60 and 76,161.20 is: 114,241.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,660.40 : 119,490.60 = 76,161.20 : x
  2. Step 2: Convert to fraction form
    79,660.40/119,490.60 = 76,161.20/x
  3. Step 3: Cross multiply
    79,660.40x = 119,490.60 × 76,161.20
  4. Step 4: Simplify right side
    79,660.40x = 9,100,547,484.72
  5. Step 5: Solve for x
    x = 9,100,547,484.72/79,660.40
  6. Step 6: Final answer
    x = 114,241.80

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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.