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Finding the Fourth Proportional to 87,695.60, 121,021.09 and 51,884.69

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Solution

The fourth proportional to 87,695.60, 121,021.09 and 51,884.69 is: 71,601.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,695.60 : 121,021.09 = 51,884.69 : x
  2. Step 2: Convert to fraction form
    87,695.60/121,021.09 = 51,884.69/x
  3. Step 3: Cross multiply
    87,695.60x = 121,021.09 × 51,884.69
  4. Step 4: Simplify right side
    87,695.60x = 6,279,141,003.29
  5. Step 5: Solve for x
    x = 6,279,141,003.29/87,695.60
  6. Step 6: Final answer
    x = 71,601.56

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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.