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Finding the Fourth Proportional to 155,003.72, 213,879.64 and 91,332.86

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Solution

The fourth proportional to 155,003.72, 213,879.64 and 91,332.86 is: 126,024.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,003.72 : 213,879.64 = 91,332.86 : x
  2. Step 2: Convert to fraction form
    155,003.72/213,879.64 = 91,332.86/x
  3. Step 3: Cross multiply
    155,003.72x = 213,879.64 × 91,332.86
  4. Step 4: Simplify right side
    155,003.72x = 19,534,239,216.97
  5. Step 5: Solve for x
    x = 19,534,239,216.97/155,003.72
  6. Step 6: Final answer
    x = 126,024.33

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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.