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Finding the Fourth Proportional to 72,169.77, 99,590.25 and 39,902.52

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Solution

The fourth proportional to 72,169.77, 99,590.25 and 39,902.52 is: 55,063.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,169.77 : 99,590.25 = 39,902.52 : x
  2. Step 2: Convert to fraction form
    72,169.77/99,590.25 = 39,902.52/x
  3. Step 3: Cross multiply
    72,169.77x = 99,590.25 × 39,902.52
  4. Step 4: Simplify right side
    72,169.77x = 3,973,901,942.43
  5. Step 5: Solve for x
    x = 3,973,901,942.43/72,169.77
  6. Step 6: Final answer
    x = 55,063.25

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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.