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Finding the Fourth Proportional to 72,988.11, 100,720.53 and 41,159.97

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Solution

The fourth proportional to 72,988.11, 100,720.53 and 41,159.97 is: 56,799.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,988.11 : 100,720.53 = 41,159.97 : x
  2. Step 2: Convert to fraction form
    72,988.11/100,720.53 = 41,159.97/x
  3. Step 3: Cross multiply
    72,988.11x = 100,720.53 × 41,159.97
  4. Step 4: Simplify right side
    72,988.11x = 4,145,653,993.18
  5. Step 5: Solve for x
    x = 4,145,653,993.18/72,988.11
  6. Step 6: Final answer
    x = 56,799.03

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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.