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Finding the Fourth Proportional to 131,892.74, 181,991.39 and 78,169.08

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Solution

The fourth proportional to 131,892.74, 181,991.39 and 78,169.08 is: 107,861.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,892.74 : 181,991.39 = 78,169.08 : x
  2. Step 2: Convert to fraction form
    131,892.74/181,991.39 = 78,169.08/x
  3. Step 3: Cross multiply
    131,892.74x = 181,991.39 × 78,169.08
  4. Step 4: Simplify right side
    131,892.74x = 14,226,099,524.22
  5. Step 5: Solve for x
    x = 14,226,099,524.22/131,892.74
  6. Step 6: Final answer
    x = 107,861.13

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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.