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Finding the Fourth Proportional to 73,121, 100,907 and 39,587

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Solution

The fourth proportional to 73,121, 100,907 and 39,587 is: 54,630.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,121 : 100,907 = 39,587 : x
  2. Step 2: Convert to fraction form
    73,121/100,907 = 39,587/x
  3. Step 3: Cross multiply
    73,121x = 100,907 × 39,587
  4. Step 4: Simplify right side
    73,121x = 3,994,605,409
  5. Step 5: Solve for x
    x = 3,994,605,409/73,121
  6. Step 6: Final answer
    x = 54,630.07

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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.