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Finding the Fourth Proportional to 131,809.55, 181,896.90 and 71,380.01

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Solution

The fourth proportional to 131,809.55, 181,896.90 and 71,380.01 is: 98,504.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,809.55 : 181,896.90 = 71,380.01 : x
  2. Step 2: Convert to fraction form
    131,809.55/181,896.90 = 71,380.01/x
  3. Step 3: Cross multiply
    131,809.55x = 181,896.90 × 71,380.01
  4. Step 4: Simplify right side
    131,809.55x = 12,983,801,363.81
  5. Step 5: Solve for x
    x = 12,983,801,363.81/131,809.55
  6. Step 6: Final answer
    x = 98,504.25

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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.