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Finding the Fourth Proportional to 131,813.76, 181,917.72 and 75,234.72

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Solution

The fourth proportional to 131,813.76, 181,917.72 and 75,234.72 is: 103,832.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,813.76 : 181,917.72 = 75,234.72 : x
  2. Step 2: Convert to fraction form
    131,813.76/181,917.72 = 75,234.72/x
  3. Step 3: Cross multiply
    131,813.76x = 181,917.72 × 75,234.72
  4. Step 4: Simplify right side
    131,813.76x = 13,686,528,727.24
  5. Step 5: Solve for x
    x = 13,686,528,727.24/131,813.76
  6. Step 6: Final answer
    x = 103,832.32

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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.