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Finding the Fourth Proportional to 72,223.29, 99,659.40 and 39,955.73

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Solution

The fourth proportional to 72,223.29, 99,659.40 and 39,955.73 is: 55,134.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,223.29 : 99,659.40 = 39,955.73 : x
  2. Step 2: Convert to fraction form
    72,223.29/99,659.40 = 39,955.73/x
  3. Step 3: Cross multiply
    72,223.29x = 99,659.40 × 39,955.73
  4. Step 4: Simplify right side
    72,223.29x = 3,981,964,078.36
  5. Step 5: Solve for x
    x = 3,981,964,078.36/72,223.29
  6. Step 6: Final answer
    x = 55,134.07

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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.