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Finding the Fourth Proportional to 79,477.20, 109,678.32 and 43,668

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Solution

The fourth proportional to 79,477.20, 109,678.32 and 43,668 is: 60,261.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,477.20 : 109,678.32 = 43,668 : x
  2. Step 2: Convert to fraction form
    79,477.20/109,678.32 = 43,668/x
  3. Step 3: Cross multiply
    79,477.20x = 109,678.32 × 43,668
  4. Step 4: Simplify right side
    79,477.20x = 4,789,432,877.76
  5. Step 5: Solve for x
    x = 4,789,432,877.76/79,477.20
  6. Step 6: Final answer
    x = 60,261.72

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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.