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Finding the Fourth Proportional to 73,169.84, 100,980.60 and 61,212.08

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Solution

The fourth proportional to 73,169.84, 100,980.60 and 61,212.08 is: 84,477.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,169.84 : 100,980.60 = 61,212.08 : x
  2. Step 2: Convert to fraction form
    73,169.84/100,980.60 = 61,212.08/x
  3. Step 3: Cross multiply
    73,169.84x = 100,980.60 × 61,212.08
  4. Step 4: Simplify right side
    73,169.84x = 6,181,232,565.65
  5. Step 5: Solve for x
    x = 6,181,232,565.65/73,169.84
  6. Step 6: Final answer
    x = 84,477.87

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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.