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Finding the Fourth Proportional to 72,980.40, 100,712.79 and 41,149.11

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Solution

The fourth proportional to 72,980.40, 100,712.79 and 41,149.11 is: 56,785.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,980.40 : 100,712.79 = 41,149.11 : x
  2. Step 2: Convert to fraction form
    72,980.40/100,712.79 = 41,149.11/x
  3. Step 3: Cross multiply
    72,980.40x = 100,712.79 × 41,149.11
  4. Step 4: Simplify right side
    72,980.40x = 4,144,241,674.12
  5. Step 5: Solve for x
    x = 4,144,241,674.12/72,980.40
  6. Step 6: Final answer
    x = 56,785.68

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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.