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Finding the Fourth Proportional to 124,388.70, 171,684.09 and 79,057.86

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Solution

The fourth proportional to 124,388.70, 171,684.09 and 79,057.86 is: 109,117.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,388.70 : 171,684.09 = 79,057.86 : x
  2. Step 2: Convert to fraction form
    124,388.70/171,684.09 = 79,057.86/x
  3. Step 3: Cross multiply
    124,388.70x = 171,684.09 × 79,057.86
  4. Step 4: Simplify right side
    124,388.70x = 13,572,976,751.45
  5. Step 5: Solve for x
    x = 13,572,976,751.45/124,388.70
  6. Step 6: Final answer
    x = 109,117.44

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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.