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Finding the Fourth Proportional to 72,919.88, 100,618.49 and 41,088.09

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Solution

The fourth proportional to 72,919.88, 100,618.49 and 41,088.09 is: 56,695.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,919.88 : 100,618.49 = 41,088.09 : x
  2. Step 2: Convert to fraction form
    72,919.88/100,618.49 = 41,088.09/x
  3. Step 3: Cross multiply
    72,919.88x = 100,618.49 × 41,088.09
  4. Step 4: Simplify right side
    72,919.88x = 4,134,221,367.34
  5. Step 5: Solve for x
    x = 4,134,221,367.34/72,919.88
  6. Step 6: Final answer
    x = 56,695.40

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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.