Home / 156,129.86-215,451.07-91,590.12

Finding the Fourth Proportional to 156,129.86, 215,451.07 and 91,590.12

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Solution

The fourth proportional to 156,129.86, 215,451.07 and 91,590.12 is: 126,389.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,129.86 : 215,451.07 = 91,590.12 : x
  2. Step 2: Convert to fraction form
    156,129.86/215,451.07 = 91,590.12/x
  3. Step 3: Cross multiply
    156,129.86x = 215,451.07 × 91,590.12
  4. Step 4: Simplify right side
    156,129.86x = 19,733,189,355.43
  5. Step 5: Solve for x
    x = 19,733,189,355.43/156,129.86
  6. Step 6: Final answer
    x = 126,389.59

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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.