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Finding the Fourth Proportional to 79,442.34, 109,631.80 and 43,633.86

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Solution

The fourth proportional to 79,442.34, 109,631.80 and 43,633.86 is: 60,215.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,442.34 : 109,631.80 = 43,633.86 : x
  2. Step 2: Convert to fraction form
    79,442.34/109,631.80 = 43,633.86/x
  3. Step 3: Cross multiply
    79,442.34x = 109,631.80 × 43,633.86
  4. Step 4: Simplify right side
    79,442.34x = 4,783,658,612.75
  5. Step 5: Solve for x
    x = 4,783,658,612.75/79,442.34
  6. Step 6: Final answer
    x = 60,215.48

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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.