Home / 124,078.72-171,288.12-76,372.96

Finding the Fourth Proportional to 124,078.72, 171,288.12 and 76,372.96

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Solution

The fourth proportional to 124,078.72, 171,288.12 and 76,372.96 is: 105,431.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,078.72 : 171,288.12 = 76,372.96 : x
  2. Step 2: Convert to fraction form
    124,078.72/171,288.12 = 76,372.96/x
  3. Step 3: Cross multiply
    124,078.72x = 171,288.12 × 76,372.96
  4. Step 4: Simplify right side
    124,078.72x = 13,081,780,737.24
  5. Step 5: Solve for x
    x = 13,081,780,737.24/124,078.72
  6. Step 6: Final answer
    x = 105,431.30

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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.