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Finding the Fourth Proportional to 72,357, 99,852.97 and 42,163.04

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Solution

The fourth proportional to 72,357, 99,852.97 and 42,163.04 is: 58,185.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,357 : 99,852.97 = 42,163.04 : x
  2. Step 2: Convert to fraction form
    72,357/99,852.97 = 42,163.04/x
  3. Step 3: Cross multiply
    72,357x = 99,852.97 × 42,163.04
  4. Step 4: Simplify right side
    72,357x = 4,210,104,268.96
  5. Step 5: Solve for x
    x = 4,210,104,268.96/72,357
  6. Step 6: Final answer
    x = 58,185.17

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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.