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Finding the Fourth Proportional to 79,881.35, 119,698.85 and 39,308.28

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Solution

The fourth proportional to 79,881.35, 119,698.85 and 39,308.28 is: 58,901.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,881.35 : 119,698.85 = 39,308.28 : x
  2. Step 2: Convert to fraction form
    79,881.35/119,698.85 = 39,308.28/x
  3. Step 3: Cross multiply
    79,881.35x = 119,698.85 × 39,308.28
  4. Step 4: Simplify right side
    79,881.35x = 4,705,155,714.94
  5. Step 5: Solve for x
    x = 4,705,155,714.94/79,881.35
  6. Step 6: Final answer
    x = 58,901.81

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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.