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Finding the Fourth Proportional to 79,590.78, 109,838.97 and 43,780.14

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Solution

The fourth proportional to 79,590.78, 109,838.97 and 43,780.14 is: 60,418.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,590.78 : 109,838.97 = 43,780.14 : x
  2. Step 2: Convert to fraction form
    79,590.78/109,838.97 = 43,780.14/x
  3. Step 3: Cross multiply
    79,590.78x = 109,838.97 × 43,780.14
  4. Step 4: Simplify right side
    79,590.78x = 4,808,765,484.06
  5. Step 5: Solve for x
    x = 4,808,765,484.06/79,590.78
  6. Step 6: Final answer
    x = 60,418.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.