Home / 129,558.72-178,835.76-75,861

Finding the Fourth Proportional to 129,558.72, 178,835.76 and 75,861

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Solution

The fourth proportional to 129,558.72, 178,835.76 and 75,861 is: 104,714.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,558.72 : 178,835.76 = 75,861 : x
  2. Step 2: Convert to fraction form
    129,558.72/178,835.76 = 75,861/x
  3. Step 3: Cross multiply
    129,558.72x = 178,835.76 × 75,861
  4. Step 4: Simplify right side
    129,558.72x = 13,566,659,589.36
  5. Step 5: Solve for x
    x = 13,566,659,589.36/129,558.72
  6. Step 6: Final answer
    x = 104,714.37

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1.5x scale

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.